During the time in England, friends began calling him "Swampy" and "Boggy", playing off of his last name. He told them that he did not want to be called "Boggy". After his return to the United States, other friends heard of his nickname and also began calling him "Swampy". After a while, Jeff began to like it.
He is the grandson of world-renown bandleader and songwriter Les Brown.
Currently married; wife of Dutch descent, which explains why Phineas and Ferb has so many references to the Netherlands, such as Buford Van Stomm's last name, Florraine from Imperfect Storm only speaking Dutch, and Paolo Vanderbeek being part-Dutch.