u₂-šu-bu-ur: OB Nippur Ea 659 (ušbar[in-law]).
uš-bar: Ea 07 MA_e (ušbar[in-law]).
u₂-uš-bur: MSL 14, 027 Iw r ii 9 (ušbar[in-law]).
u₂-šu-bu-ur: Ni 05365 r ii 9' (ušbar[in-law]).