Is Jimo a compound surname?

Yes Jimo originated from Gui family, and Tian Dan, the general of Qi State, defended the city during the Warring States Period. Later generations took the city as their surname, so there was the surname Jimo, which is one of the very old surnames. According to the historical book History of the Scholars, Jimo was a native of Qi during the Warring States Period, and ancient books also proved that Jimo was a compound surname.