well it seems he was an elder in the 7th day adventist church who died in 1913 and i reckon this is the interview mentioned in the book you linked to:
http://www.ex-sda.com/john.htm
The surname Amadon isn't real common but more states had some than not in the 1920 census:
http://www.ancestry.com/facts/Amadon-family-history.ashx
there were more of the alternate spelling Amidon:
http://www.ancestry.com/facts/Amidon-family-history.ashx
which gives this info:
Quote:
Amidon Name Meaning and History
Said to be a French Huguenot name. Family genealogists assert that it is recorded in western France, at La Rochelle and Bordeaux, in the departments of Gironde and Charente, in the spellings Amidon and Amadon. If this is the source, the etymology is not known.
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