Sir Thomas Fitz Gospatric, Lord of Culwen, of Workington - his parents are the same as his wife's parents

His parents seem the same as his wife's parents

The parents for Thomas Fitzgospatric are
Gospatrick 1105-1179 Gospatrick of High Ireby, Lord of Workington
Egelina 1114-1133 Lady Egelina de Workington

The parents for his wife, Grace Ireby are
Gilbert or Gospatrick 1105-1179 Gilbert or Gospatrick Ireby
Egeline 1108-1133 Egeline (D'Engaine Ireby) Engaine

I'm thinking his parents are Gospatrick and Egelina d'Engaine. The parents of his wife (who was Grace de Culwen -NOT his sister Grace Irby) would be Thomas de Culwen and unknown dau of Fergus.
see http://www.washington.ancestryregister.com/GALLOWAY00006.htm#i5032

What do you think?