From Middle English and-, ond-, from Old English and-, ond- (“against, back”), from Proto-Germanic *and-, *anda-, *andi- (“across, opposite, against, away”), from Proto-Indo-European *anta, *anti (“across, forth”), from Proto-Indo-European *ant- (“forehead, foreside, end, limit”). Cognate with Dutch ont-, German ant-, ent-, emp-, Icelandic and-, Gothic - (and-), Latin ante (“before”), Ancient Greek ἀντί (anti, “against”).
From Wiktionary
From Middle English -and, -end, -ant, -nd, from Old English -ende, -ande, present participle ending of verbs, and Old English -end, -nd, agent ending, both from Proto-Germanic *-andz (present participle suffix), from Proto-Indo-European *-anto-. More at -ing.
From Wiktionary
From Latin gerundive termination -andus, -endus. More at -end.
From Wiktionary
Middle English from Old English en in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From and
From American Heritage Dictionary of the English Language, 5th Edition