Áðum

According to the Old English Dictionary:

es ;

ÁÐUM

m, A son-in-law, a daughter's husband, a brother-in-law, a sister's husband; gener; sororis, ut et patris, sororis maritus :-- Áðum gener, Ælfc. Gr. 8; Som. 7, 18. Hæfst ðú suna oððe dóhtra oððe áðum habes filios aut filias aut generum, Gen. 19, 12. Cwæþ to his twám áðumum locutus est ad generos suos, 19, 14 : Exon. 66 b ; Th. 246, 22; Jul. 65. Fór to ðam cynge his áðume went to the king his sister's husband, Chr. 1091; Th. 359. 6. [Ger. eidam a daughter's husband : M. H. Ger. eidem, id: O. H. Ger. eidum, eidam, eidem, id.] aðum,aþum