[Opinions] Re: Middle name of note
It is an odd name for sure. It seems one of your ancestors was trusted to keep the liquor! Here's what I found:
Buttery Surname Meaning
English:: from Anglo-Norman French boterie ‘buttery’ (from Late Latin botaria a derivative of bota ‘cask’) hence a metonymic occupational name for the keeper of a buttery. The term originally denoted a store for liquor but soon came to mean a store for provisions in general. habitational name from Buttery (Shropshire).
Source: Dictionary of American Family Names 2nd edition, 2022