Them

google

ref

Middle English: from Old Norse theim ‘to those, to them’, dative plural of sá ; related to their and they.

wiktionary

ref

From Middle English þem, from Old Norse þeim.

etymonline

ref

them (pron.)

third person plural pronoun, c. 1200, from Old Norse þeim, dative of plural personal and demonstrative pronoun þeir (see they). Replaced Old English cognate him, heom.