Ay señor...
"Carole's maternal great-grandfather was Durham coal miner John Harrison (1874–1956). Her paternal great-great-grandfather was John Goldsmith (d. 1888), a labourer and brick maker from Hoxton in the East End of London.[22]"
https://en.wikipedia.org/wiki/Carole_Middleton#Ancestry
Tú mism@ lo expones claramente, @Whatever:
- Maternal... - - > Harrison
- Paternal... - - > Goldsmith
Luego, ¿cuál era el apellido de soltera de Carole Middleton?
Saludos!