From Middle English fillen, fullen, from Old English fyllan, from Proto-Germanic *fullijaną, from *fullaz, from Proto-Indo-European *pl̥h₁nós. Cognate with Scots fill, West Frisian folje, Low German füllen, Dutch vullen, German füllen, Danish fylde, Swedish fylla, Norwegian fylle, Icelandic fylla and Latin plenus
From Middle English fylle, vulle, fülle, from Old English fyllu, from Proto-Germanic *fullį̄ ("fullness"). Cognate with German Fülle.