An Etymological Dictionary of the German Language/und
Appearance
und, conj., ‘and,’ from the equiv. MidHG. unt, unde, OHG. unta, unti (inti, enti); corresponding to OSax. ęndi, Du. en, AS. and E. and. Sans. útha, ‘also, further, and,’ points, like AS. and E. and, to Aryan nthá.