Question: Who is the sibling of Osorkon Iii?

Knowledge 1: Osorkon III
Usermaatre Setepenamun Osorkon IIISi-Ese was Pharaoh of Egypt in the 8th Century BC.He is the same person as the Crown Prince and High Priest of Amun Osorkon B, son of Takelot II by his Great Royal Wife Karomama II.Prince Osorkon B is best attested by his "Chronicle"—which consists of a series of texts documenting his activities at Thebes—on the Bubastite Portal at Karnak.He later reigned as king Osorkon III in Upper Egypt for twenty-eight years after defeating the rival forces of Pedubast I/Shoshenq VI who had apparently resisted the authority of his father here.Osorkon ruled the last five years of his reign in coregency with his son, Takelot III, according to Karnak Nile Level Text No. 13.Osorkon III's formal titulary was long and elaborate: Usermaatre Setepenamun, Osorkon Si-Ese Meryamun, Netjer-Heqa-waset. [SEP] Knowledge 2: Takelot II
Hedjkheperre Setepenre Takelot IISi-Ese was a pharaoh of the Twenty-third Dynasty of Ancient Egypt in Middle and Upper Egypt.He has been identified as the High Priest of Amun Takelot F, son of the High Priest of Amun Nimlot C at Thebes and, thus, the son of Nimlot C and grandson of king Osorkon II according to the latest academic research.Based on two lunar dates belonging to Takelot II, this Upper Egyptian pharaoh is today believed to have ascended to the throne of a divided Egypt in either 845 BC or 834 BC.Most Egyptologists today, including Aidan Dodson, Gerard Broekman, Jürgen von Beckerath, M.A. Leahy and Karl Jansen-Winkeln, also accept David Aston's hypothesis that Shoshenq III was Osorkon II's actual successor at Tanis, rather than Takelot II.As Aidan Dodson and Dyan Hilton write in their comprehensive book on the royal families of Ancient Egypt:
Takelot II is likely to have been identical with the High Priest Takelot F, who is stated in [the] Karnak inscriptions to have been a son of Nimlot C, and whose likely period of office falls neatly just before Takelot II's appearance.Takelot II rather ruled a separate kingdom that embraced Middle and Upper Egypt, distinct from the Tanite Twenty-second Dynasty which only controlled Lower Egypt.Takelot F, the son and successor of the High Priest of Amun Nimlot C, served for a period of time under Osorkon II as a High Priest of Amun before he proclaimed himself as king Takelot II in the final three regnal years of Osorkon II.This situation is attested by the relief scenes on the walls of Temple J at Karnak which was dedicated by Takelot F – in his position as High Priest – to Osorkon II, who is depicted as the celebrant and king.All the documents which mention Takelot II Si-Ese and his son, Osorkon B, originate from either Middle or Upper Egypt (none from Lower Egypt) and a royal tomb at Tanis which named a king Hedjkheperre Setepenre Takelot along with a Year 9 stela from Bubastis are now recognised as belonging exclusively to Takelot I.While both Takelot I and II used the same prenomen, Takelot II added the epithet "Si-EseSon of Isis") to his royal titulary both to affiliate himself with Thebes and to distinguish his name from Takelot I.
Knowledge 1: Osorkon III
Usermaatre Setepenamun Osorkon IIISi-Ese was Pharaoh of Egypt in the 8th Century BC.He is the same person as the Crown Prince and High Priest of Amun Osorkon B, son of Takelot II by his Great Royal Wife Karomama II.Prince Osorkon B is best attested by his "Chronicle"—which consists of a series of texts documenting his activities at Thebes—on the Bubastite Portal at Karnak.He later reigned as king Osorkon III in Upper Egypt for twenty-eight years after defeating the rival forces of Pedubast I/Shoshenq VI who had apparently resisted the authority of his father here.Osorkon ruled the last five years of his reign in coregency with his son, Takelot III, according to Karnak Nile Level Text No. 13.Osorkon III's formal titulary was long and elaborate: Usermaatre Setepenamun, Osorkon Si-Ese Meryamun, Netjer-Heqa-waset. [SEP] Knowledge 2: Shoshenq III
King Usermaatre Setepenre/ Setepenamun Shoshenq III ruled Egypt's 22nd Dynasty for 39 years according to contemporary historical records.Two Apis Bulls were buried in the fourth and 28th years of his reign and he celebrated his Heb Sed Jubilee in his regnal year 30.Little is known of the precise basis for his successful claim to the throne since he was not a son of Osorkon II and Shoshenq's parentage and family ties are unknown.From Shoshenq III's eighth regnal year, his reign was marked by the loss of Egypt's political unity, with the appearance of Pedubast I at Thebes.Henceforth, the kings of the 22nd Dynasty only controlled Lower Egypt.The Theban High Priest Osorkon B( the future Osorkon III) did date his activities at Thebes and( Upper Egypt) to Shoshenq III's reign, but this was solely for administrative reasons since Osorkon did not declare himself king after the death of his father, Takelot II.On the basis of Osorkon B's well known" Chronicle", most Egyptologists today accept that Takelot II's 25th regnal year is equivalent to Shoshenq III's 22nd year.
Knowledge 1: Osorkon III
Usermaatre Setepenamun Osorkon IIISi-Ese was Pharaoh of Egypt in the 8th Century BC.He is the same person as the Crown Prince and High Priest of Amun Osorkon B, son of Takelot II by his Great Royal Wife Karomama II.Prince Osorkon B is best attested by his "Chronicle"—which consists of a series of texts documenting his activities at Thebes—on the Bubastite Portal at Karnak.He later reigned as king Osorkon III in Upper Egypt for twenty-eight years after defeating the rival forces of Pedubast I/Shoshenq VI who had apparently resisted the authority of his father here.Osorkon ruled the last five years of his reign in coregency with his son, Takelot III, according to Karnak Nile Level Text No. 13.Osorkon III's formal titulary was long and elaborate: Usermaatre Setepenamun, Osorkon Si-Ese Meryamun, Netjer-Heqa-waset. [SEP] Knowledge 2: Takelot III
Usimare Setepenamun Takelot III Si- Ese( reigned 774–759 BC) was Osorkon III's eldest son and successor.Takelot III ruled the first five years of his reign in a coregency with his father, according to the evidence from Nile Quay Text No.14( which equates Year 28 of Osorkon III to Year 5 of Takelot III), and succeeded his father as king the following year.He served previously as the High Priest of Amun at Thebes.He was previously thought to have ruled Egypt for only 7 years until his 13th Year was found on a stela from Ahmeida in the Dakhla Oasis in 2005.

Answer: Shoshenq III