The Collaborative International Dictionary of English v.0.48:

yawd \yawd\ (y[add]d), n. [Cf. Icel. jalda a mare, E. jade a
   nag.]
   A jade; an old horse or mare. [Written also yaud.] [Prov.
   Eng. & Scot.] --Grose.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Yaud \Yaud\, n.
   See Yawd. [Prov. Eng. & Scot.]
   [1913 Webster]