ḥatnā - son-in-law, groom (LSyr. 264, SL 505)

occasionally also ‘father-in-law’ and ‘brother-in-law’ Connection with the verbal root ḫtn ‘to circumcise,’ completely isolated in Arabic (Lane 703), is widely accepted (HALOT 364‒365), but difficult to prove (Kogan 2015: 191)