From Old Dutch*lengitha, from Proto-Germanic*langiþō. Corresponds to lang +-te. Cognate with German Low German Längde, Längd, Längte, Längt(“length”), English length, Scots lenth, lainth(“length”), Saterland Frisian Loangte(“length”), West Frisian lingte, langte(“length”), Danish længde(“length”), Swedish längd(“length”), Icelandic lengd(“length”).