As a son of Osorkon I, Iuwelot was brother of his predecessor Shoshenq C, of his successor Smendes III and of his contemporary king Takelot I.

[3] On the Stèle de l'apanage is reported that the northern limit of his jurisdiction as a military commander was the province of Asyut.

On his Theban funerary stele (British Museum 1224[1]), he is depicted together with his wife Tadenitenbast, here called "sister", both worshipping Ra-Horakhty.

His son Wasakawasa is known by an electrum pectoral dedicated to Thoth, Lord of Hermopolis (Petrie Museum UC13124[7]), although he will never become High Priest like the father.

[8] A daughter, Djed-ese-es-ankh, is also known[9] while another son, Khamweset, is mentioned on the Stèle de l'apanage as the beneficiary of his father's Theban possessions.