THe stonecutters shop had Zahotep and Pai while Gebu had GebuXD
He was a porter for Rekh the goldsmith. Then, later in the book he becomes Gebu's stonecutting apprentice. :) In the begginning, Ranofer was a porter for Rekh the goldsmith, then he became Gebu the stonecutter's apprentice, also his half brother, and in the end he becomes Zau's the Master goldsmith's apprentice.
I believe it's a bastardization of the name, "Jesus." I've heard it on The Simpsons; Homer says, "Help me Gebus!" (Jeebus)