I'd vote Dutch/Low German as most likely source for English usage, given the century for the latter (late fourteenth into fifteenth). Cleasby-Vigfusson gives the Old Icelandic usage as from Karlamagnússaga, and thus it is suspect from a purist's standpoint, since a multilingual person (at least a person who could read multiple langs, even if not able to speak all of them) created that text. "Earlier" babble v.1, btw, isn't much earlier--the Nero Ancrene Wisse is mid-C13.