--- title: "Chiang Mai 1999: Coby and Hans Siegenthaler - Delegate Introductions - IVU - International Vegetarian Union" description: "Chiang Mai 1999: Coby and Hans Siegenthaler - Delegate Introductions: International Vegetarian Union (IVU) 33rd World Vegetarian Congress Chiang Mai, Thailand, January 4 - 10, 1999 'Vegetarianism is the Way' an unforgettable visual, cultural and gastronomic experience Coby & Hans Siegenthaler. Born and raised in the Netherlands." url: "https://ivu.org/international-vegetarian-union/resources/interviews/3665-congress-thai99-profiles-coby-hans.html" date: "2026-11-06T00:12:44+00:00" language: "en-GB" --- # Chiang Mai 1999: Coby and Hans Siegenthaler - Delegate Introductions **International Vegetarian Union (IVU)** | ![IVU logo](https://ivu.org/images/legacy/history/members/pics/ivu-con4.gif) | | |---|---| | ![Congress Logo](https://ivu.org/images/legacy/history/congress/thai99/pics/logo99.gif) **33rd World Vegetarian Congress** Chiang Mai, Thailand, January 4 - 10, 1999 *'Vegetarianism is the Way'* an unforgettable visual, cultural and gastronomic experience Coby & Hans Siegenthaler. Born and raised in the Netherlands. We were both fortunate that our parents raised us as vegetarians. We are vegan since about 15 or 20 years. Coby is an RN (registered nurse); Hans is a chemical engineer. In 1955 we emigrated to the USA and have lived ever since in Los Angeles. We like camping, skiing and had a 25 ft sailboat for 19 years. We enjoyed sailing to the off-shore islands in the Pacific Ocean. On the July 4 holiday we took a lot of members of a vegetarian society for a couple of rides on the ocean. We traveled a lot throughout the world; a lot via youth hostels. We are active in defending animals and participate in many marches. We support anti-vivisection, Last Chance for Animals, animal sanctuaries, anti-hunting groups, anti-fur march, Nature of Wellness (who produced a wonderful video "Lethal Medicine", shown on many TV stations),etc. Two times we had/have a vegan foreign exchange student living with us. We had a lot of vegan or vegetarian visitors staying with us. We attended the international vegetarian conference in Ulm (Germany) in 19.., and in The Hague (Netherlands) in 1994 and several ones in the US. Everyone should at least once in their lifetime attend a vegan conference; they are so invigorating! Children: a daughter and a son. From the son we inherited an antique automobile, a 1929 Whippet (built by Willys-Overland), which we recently drove in a parade. Now I try to sell it (with a lot of spare parts). So long, in Thailand. A note on this archive. The history section of this website is drawn from a body of legacy content originally compiled by John Davis, former manager of the International Vegetarian Union. It represents his curation of historical material, and in places includes passages written by him directly. Over the years, the IVU website has migrated between several different hosting servers. In the course of these migrations, a number of PDF files were unfortunately lost, and **some links to PDF documents may no longer function**. Where this is the case, we have chosen to leave the original link text in place, as it may itself carry information of historical value. - Hits: 919 ### Vegan Recipes - [![VEGAN NORI ROLLS](https://ivu.org/media/zoo/images/th10%20115_ae57eaa1801d910053123cc9f5ee3121.jpg "VEGAN NORI ROLLS")](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/item/vegan-nori-rolls.html "VEGAN NORI ROLLS") #### [VEGAN NORI ROLLS](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/item/vegan-nori-rolls.html "VEGAN NORI ROLLS") [Breakfast and brunch](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/breakfast-and-brunch.html) [Vietnam](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/vietnam.html) [Snacks](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/snacks.html) - #### [Moroccan Lentils](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/item/moroccan-lentils.html "Moroccan Lentils") [Protein Rich](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/proteiin-rich.html) [Main course](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/main-course-for-lunch-and-dinner.html) [Soups](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/soup.html) [Morocco](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/morocco.html) [Whole Food Plant Based](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/whole-plant-based.html) [African](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/african.html) - [![Dabo Kolo (Ethiopian Fried Snacks)](https://ivu.org/media/zoo/images/dal0-kolo_a5950756dcc8b7529fa559477c9d2ce9.png "Dabo Kolo (Ethiopian Fried Snacks)")](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/item/dabo-kolo-ethiopian-fried-snacks.html "Dabo Kolo (Ethiopian Fried Snacks)") #### [Dabo Kolo (Ethiopian Fried Snacks)](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/item/dabo-kolo-ethiopian-fried-snacks.html "Dabo Kolo (Ethiopian Fried Snacks)") [Ethiopia](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/ethiopian.html) [Snacks](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/snacks.html) [African](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/front-page/category/african.html) ### VFA Blog - [![Discover the Delicious and Nutritious Vegan Options in Vietnamese Cuisine](https://ivu.org/media/zoo/images/vegan_pho_2_479e2169741496f288a53bb1c218745a.jpg "Discover the Delicious and Nutritious Vegan Options in Vietnamese Cuisine")](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/blog-front-page/item/discover-the-delicious-and-nutritious-vegan-options-in-vietnamese-cuisine.html "Discover the Delicious and Nutritious Vegan Options in Vietnamese Cuisine") #### [Discover the Delicious and Nutritious Vegan Options in Vietnamese Cuisine](https://ivu.org/vegan-recipes-around-the-world/vegan-food-academy/blog-front-page/item/discover-the-delicious-and-nutritious-vegan-options-in-vietnamese-cuisine.html "Discover the Delicious and Nutritious Vegan Options in Vietnamese Cuisine") - 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[ pdf ](https://ivu.org/nutrition/nutrition-articles/health-nutrition/250-2024-the-omniveg-study-health-outcomes-of-shifting-from-a-traditional-to-a-vegan-mediterranean-diet-in-healthy-men-a-controlled-crossover-trial.html) [ 2024 The OMNIVEG STUDY Health outcomes of shifting from a traditional to a vegan Mediterranean diet in healthy men A controlled crossover trial](https://ivu.org/nutrition/nutrition-articles/health-nutrition/250-2024-the-omniveg-study-health-outcomes-of-shifting-from-a-traditional-to-a-vegan-mediterranean-diet-in-healthy-men-a-controlled-crossover-trial.html) Popular 2782 downloads - [ pdf ](https://ivu.org/nutrition/nutrition-articles/health-nutrition/205-plant-based-nutrition-exploring-health-benefits-for-atherosclerosis-chronic-diseases-and-metabolic-syndrome-a-comprehensive-review.html) [ Plant Based Nutrition Exploring Health Benefits for Atherosclerosis, Chronic Diseases, and Metabolic Syndrome—A Comprehensive Review](https://ivu.org/nutrition/nutrition-articles/health-nutrition/205-plant-based-nutrition-exploring-health-benefits-for-atherosclerosis-chronic-diseases-and-metabolic-syndrome-a-comprehensive-review.html) Popular 3834 downloads - [ pdf ](https://ivu.org/nutrition/nutrition-articles/health-nutrition/204-2024-plant-and-animal-fat-intake-and-overall-and-cardiovascular-disease-mortality-main-folder-all-cause-mortality.html) [ 2024 Plant and Animal Fat Intake and Overall and Cardiovascular Disease Mortality Main Folder All Cause Mortality](https://ivu.org/nutrition/nutrition-articles/health-nutrition/204-2024-plant-and-animal-fat-intake-and-overall-and-cardiovascular-disease-mortality-main-folder-all-cause-mortality.html) Popular 4052 downloads ![](https://ivu.org/media/yootheme/cache/02/adult-guide-029d8cad.png)### The International Vegetarian Union’s Vegan Nutrition Guide for Adults In 2 versions: - [For healthcare professionals](https://ivu.org/nutrition/nutritional-guide/the-international-vegetarian-union-s-vegan-nutrition-guide-for-adults-healthcare-professionals.html) - [General Public Edition](https://ivu.org/nutrition/nutritional-guide/guide-for-non-healthcare-professionals.html) [Get it now](https://ivu.org/nutrition/nutritional-guide.html) ![](https://ivu.org/images/banners/booklet2.jpg)### Vegetarian Nutrition Booklet A Dietary Approach to Vegetarianism for Kids and Adolescents The intention of this booklet is present to kids and adolescents a healthy vegan diet [Read more](https://ivu.org/nutrition/vegetarian-nutrition-book-for-kids-and-adolescents.html) Vegan Nutrition ![](https://ivu.org/media/yootheme/cache/a6/logo_IVU_01_SLOGAN-a678b962.png) ### Presidents, Chair and Council - 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