However, since the late 1980s, Egyptologists have assigned several documents mentioning a king Takelot in Lower Egypt to him rather than Takelot II. Takelot I's reign was relatively short when compared to the three decades-long reigns of his father Osorkon I and son, Osorkon II. Takelot I, rather than Takelot II, was the king "Hedjkheperre Setepenre Takelot" who is attested by a Year 9 stela from Bubastis as well as the owner of a partly robbed Royal Tomb at Tanis which belonged to this ruler as the German Egyptologist Karl Jansen-Winkeln reported in a 1987 "Varia Aegyptiaca" 3 (1987), pp. 253–258 paper. Evidently, both king Takelots used the same royal prenomen: Hedjkheperre Setepenre. The main difference between Takelot I and II is that Takelot I never employed the Theban-inspired epithet 'Si-Ese' "Son of Isis" in his titulary, unlike Takelot II.