μητράδελφος
From LSJ
θαρσεῖν χρὴ φίλε Βάττε: τάχ' αὔριον ἔσσετ' ἄμεινον → you need to be brave, dear Battus; perhaps tomorrow will be better | Take heart, dear Battos! Tomorrow will be better.
English (LSJ)
[ᾰδ], Dor. ματρᾰδελφεός, Pi.P.8.35: ὁ and ἡ:—
A mother's brother or sister, uncle or aunt, BGU 1158.3, Poll.3.22.
