United States. War Department, Dictionary of Spoken Russian — §13… (1945)
“ Most of these mean "obtained from" a living being: рыбий "of fish," божий "of God, divine." Family names and place names whose stem ends in [-in, -ov] have noun-like forms in the nominatives, the F accusative, and the M and Ng, d, and l; thus, the family name Петров has Fn Петрова, a Петрову ”
