What is a ‘Frum’? Some sort of holiday season beverage made with wine or ale and spices?
Frum means devout or observant, in Yiddish...
http://en.wikipedia.org/wiki/Frum
A last name is really not to a person’s fault or credit; in most circumstances one is born to (or marries into) a surname. Lots of fun in researching people’s last names, and when they received them, but that is another topic, for another day.
David Frum is not a bad fellow. I have met him and he is quite nice, and very smart. As to his political leanings, or his conclusions, they differ a bit from a conservative stance.
“Frum” is what orthodox Jews call their way of life.