agnate chiefly Law [ 'agneɪt ]
■ 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 (in sense 2).
Derivatives
agnatic -'natɪk adjective
agnation noun
Origin
C15: from L. agnatus , from ad- 'to' + gnatus , natus 'born'.