Proper noun
Tatlock (plural Tatlocks)
A surname.
According to the historian Gregg Herken, this naming could have been an allusion to Jean Tatlock, who had committed suicide a few months previously and had in the 1930s introduced Oppenheimer to Donne's work. Source: Internet
They included his brother Frank, Frank's wife Jackie, citation Kitty, citation Jean Tatlock, his landlady Mary Ellen Washburn, citation and several of his graduate students at Berkeley. Source: Internet