From Wiktionary, the free dictionary
From вичи (viči, “brother”) + гъар (ɣar, “son”).
вичегъар • (vičeɣar)
- fraternal nephew
- Gukasjan, Vorošil (1974) “вичегъар”, in Удинско-азербайджанско-русский словарь [Udi–Azerbaijani–Russian Dictionary][1], Baku: Academy Press, page 99