I think that not giving a pronunciation left things wide open for our definers.

as to..
SIR CEART PRIESE GROUGH, BARONET, OF THOVE
Ough in Grough may be pronounced in any one of the eight ways above enumerated; so our baronet's patronymic may be Grau, Gro, Groo, or Grou; Grof, Gruf, Groh, or Grup.

- Chamber's Edinburgh Journal, Oct. 5, 1844