The Glubb surname is a rare British name, primarily found in the UK, particularly with historical roots in the West Country, and is famously associated with British Army officer Sir John Bagot Glubb (Glubb Pasha). It may have origins as a nickname for a small person or as an Americanized form of the German name "Grube".
Wikipedia
Key Details about the Glubb Surname:
Origins: It may derive from Middle English words grub(be), grob(be), or crubbe, referring to a "grub" or insect larva, often used as a nickname for a small person. It may also be an Americanized form of the German name "Grube".