agnate
Concise Oxford English Dictionary © 2008 Oxford University Press:
agnate /ˈagneɪt/ chiefly Law
▶noun a person descended from the same male ancestor as another, especially through the male line. ▶adjective descended from the same male ancestor. Compare with cognate (sense 2 of the adjective).
– derivatives
agnatic /-ˈnatɪk/ adjective,
agnation noun.
agnatic /-ˈnatɪk/ adjective,
agnation noun.
– origin C15: from L. agnatus, from ad- ‘to’ + gnatus, natus ‘born’.
'agnate' also found in these Oxford entries:

