γνωτοφόνος

ον, ιδος, ἡ
A. murderer of another's brother, Nonn. D. 26.82:— fem. γνωτο‐φόντις, ιδος, ἡ, murderess of a brother, Lyc. 1318.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project