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Books about Gronenthal:
Gronenthal genealogy: An account of the German immigrants John and Christina Gronenthal of Brooklyn, New York... by Curtis Valentine Groenthal (1984)
Wiki information Gronenthal:
Harold Gronethal is a television producer.
Max Carl Gronenthal is an American rock singer, keyboardist, guitarist and songwriter. He is the current lead singer of the classic rock band Grand Funk Railroad. In addition, he spent several years as the keyboardist and lead singer for the southern...