The Joan Baez Songbook suggests chords as follows for the key of D:

An [G(D)]earthly [F(C)]nurse sits and [G(D)]sings,
And aye, she [F(C)]sings by lily [G(D)]wean,
And [C(G)]little ken [G(D)]I my [F(C)]bairn's fath-[G(D)]er,
Far [F(C)]less the [Am(Em)]land where [Dm(Am)]he dwells [G(D)]in.