Barry Goldwater, Jr., who was very close to his father (politically and otherwise) is an outspoke Ron Paul supporter.
Another interesting fact is that the senior Goldwater was strongly opposed to the rise of the Christian Right in the 1980s. Paul, though being a Christian and strongly pro-life, has never made his religious beliefs a part of his program. In Iowa, he actually did better in Catholic dominated counties in the eastern part of the state than in the more evangelical ones in the northwest and south. Huckabee appeals to the same constituency that Robertson did in 1988. The libertarian voters are a different sort than the Christian Right and are uncomfortable with them. It is thus not surprising that the younger Goldwater would align with Paul, even though his father was on foreign policy matters far more hawkish than Paul.