John Davis for VegSource on how the term ‘vegan’ came to be:
The idea of living entirely on plants has been around for a very long time, it was just the word ‘vegan’ that was new in 1944. During the 19th century there were endless debates between those who added eggs and dairy produce to their plants, and those who did not. From 1847, the word ‘vegetarian’ was used by both, with or without various appendages.
Here’s how the word came to be:
The group would also have discussed the rather clumsy name ‘Non-Dairy Produce Group’, and begun the process of looking for something better. The initial informal name change was to replace ‘Non-Dairy Produce Group’ with just ‘Non-Dairy Vegetarians’, possibly agreed at a meeting, or maybe just unilaterally by Watson later that month. In his 2nd Vegan News (February 1945 p.2) Watson reported: Before the appearance of our first issue [November 24, 1944], Mr. and Mrs. G. A. Henderson suggested the word “Allvega”, with “Allvegan” as the magazine title. It was from this that the word Vegan was taken, and recently Mr. and Mrs. Henderson have written stating that they prefer the shorter version. There is no way of knowing how they were initially pronouncing these words. ‘Vega’ was the name of a London vegetarian restaurant at that time, which might have provided some inspiration. It is possible that the Hendersons’ suggestions were made at an Attic Club meeting, though neither they nor Watson ever mentioned that, or he might have received their ideas later by post (probably from Fay, signing as both). By “recently” in the above quote from February 1945, Watson is saying that the Hendersons gave their support during the three months after the publication of the first Vegan News.
And I love that our history of the word gets wrapped in the telling of a story at a funeral:
Another view of the origin of the word vegan emerged at Donald Watson’s funeral in 2005: Speaking at Donald’s funeral, Janet [his only child] mentioned a day that Dorothy and Donald both attended a dance. During the event the two started discussing the founding of a new society; and Dorothy came up with the word vegan as a possible name for it, on the basis that its letters are the beginning and conclusion of vegetarian.