Both appear to be derived from the same source: https://en.m.wiktionary.org/wiki/Dutzend https://en.m.wiktionary.org/wiki/Dutzend https://en.m.wiktionary.org/w

Both appear to be derived from the same source: https://en.m.wiktionary.org/wiki/Dutzend https://en.m.wiktionary.org/wiki/Dutzend https://en.m.wiktionary.org/wiki/tuzin https://en.m.wiktionary.org/wiki/tuzin https://en.m.wiktionary.org/wiki/dozen https://en.m.wiktionary.org/wiki/dozen The most recent common ancestor is Old French “dozaine”, and ultimately it derives from Latin “duodecim”.