From Middle English *sneden, *snæden (found in compound tosnæden), from Old English snǣdan ("to cut; feed"), from Proto-Germanic *snaidijaną, related to Middle High German sneiten, Icelandic sneiða, English snithe. More at snithe.
From Middle English snade, snede, from Old English snǣd ("a piece, bit, slice"), related to Icelandic sneið.