From the Internet:

Sent by an Orthodox (Sephardic) rabbi in Israel:

It is interesting to note the following in the family tree of Kate Middleton, wife of Prince William:

Kate’s mother is Carol Middleton, daughter of Ronald Goldsmith and Dorothy Harrison (both Jews)

The parents of Dorothy Harrison are Robert Harrison and Elizabeth Temple (both Jews), the latter a descendant of the Myers family (traditional English Jews in the 19th century)

Bottom line: Princess Kate is a Jew on her matrilineal side, and as a consequence, the future king of England will be a Jew according to Jewish Law and tradition.