A little over 1/2 Irish, some German, English and French.
Interestingly enough Prince Albert recently received an email from a European relation. He'd been told that the family was originally named van Doerve (sp?) but changed it to an English name relating the the textile industry. Turns out the name is French, not English and there was no van Doreve. Anyway, that means he's half German, some French and Spanish.