What does agnate mean?
The definition of agnate
Ag”nate, a.
Etym: [L. agnatus, p. p. of agnasci to be born in addition to; ad + nasci (for gnasci) to be born. Cf. Adnate.]

1 Related or akin by the father’s side; also, sprung from the same male ancestor.
2 Allied; akin. “Agnate words.” Pownall. Assume more or less of a fictitious character, but congenial and agnate with the former. Landor.

Ag”nate, n.
Etym: [Cf. F. agnat.] (Civil Law)

A relative whose relationship can be traced exclusively through males.