Probably from a porcelain d'Uccle.
From Dictionary.com for Uccle, Uc·cle: /ˈuklə; Fr. ˈüklə/ Show Spelled[oo-kluh; Fr. y-kluh] Through the d in front and it would be "D oo-kluh"
I agree on the pekin cross. I don't think you guys call them cochin over there but pekin bantams, right?