Daniel Knight Udy (21 May 1874 – 29 July 1935) was a New Zealand rugby union player.
A hooker, Udy represented Wairarapa at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1901 to 1903.
He played nine matches for the All Blacks including one international.
[3] A cousin Hart Udy represented New Zealand in 1884.
This biographical article relating to New Zealand rugby union, about a person born in the 1870s, is a stub.