Eám

According to the Old English Dictionary:

eán

eám

to waters :-- Ofer ðám eam sŭper flūmĭna, Ps. Th. 23, 2. Betweoh ðám twám eán between the two waters, Ors. 1. 1; Bos. 16, 28; dat. pl. of eá. eam