Ealde-móder

According to the Old English Dictionary:

ealde-móder

a grandmother. Cf. eald, VI a :-- For mínes leófan fæder sáwle and for mínre ealdemódor for my dear father's soul and for my grandmother's, Cht. Th. 562, 27. Þone bule ðe wæs hire ealder-móder, 548, 8. [O. Frs. ald-móder (alde móder according to Richthofen is more correct than alde-móder).] ealde-moder