Question: Who was a member of the court of the second king of the Kingdom of Hawaii that is often confused with his half-brother?

Context articles: Catherine of Bosnia (princess)
Ibn Shaprut
Beóán of Mortlach
Ywain the Bastard
Betula pubescens
Queen post
'Fresno Chili' pepper
Kamehameha II
Atys (King of the Maeonians)
James Kānehoa

Catherine of Bosnia (Bosnian: "Katarina Tomašević Kotromanić" /Катарина Томашевић Котроманић; born in 1453) was a member of the House of Kotromanić and the last Bosnian princess.
 She was the only daughter of King Thomas and Queen Catherine, who also had a son named Sigismund.
 When Thomas died, in July 1461, the Bosnian crown devolved upon her older half-brother, Stephen Tomašević.
 Catherine and Sigismund are popularly said to have moved at that time with their mother to the castle of Kozograd above Fojnica.
 It is likely, however, that they remained at the royal court in Jajce, being their half-brother's closest heirs.
 In 1463, the Ottomans led by Mehmed the Conqueror invaded Bosnia.
 The royal family apparently decided to split and flee towards Croatia proper and the coast in different directions to confuse and mislead the invaders.
 Sigismund and Catherine, separated from their mother, were nevertheless captured in the town of Zvečaj, close to Jajce.
 Their half-brother the King was deceived into surrendering in Ključ, and was executed shortly afterwards.
 Queen Catherine succeeded in escaping and eventually settled in Rome.
Shem-Tob ben Isaac Shaprut of Tudela (שם טוב אבן שפרוט) (born at Tudela in the middle of the 14th century) was a Spanish Jewish philosopher, physician, and polemicist.
 He is often confused with the physician Shem-Tob ben Isaac of Tortosa, who lived earlier.
 He may also be confused with another Ibn Shaprut, Hasdai Ibn Shaprut, who corresponded with the king of the Khazars in the 900's.
Beóán of Mortlach is the first of the three known Bishops of Mortlach.
 His name, which could also be written in non-Gaelic contexts as Beanus, Beoanus and Beyn, means "lively one".
 Walter Bower, following John of Fordun, tells us that the bishopric was founded by king Máel Coluim II of Scotland in the seventh year of his reign (1012 AD) as thanks to God for victories over the Scandinavians, and tells us that "the first bishop was Beyn, a saintly man, worthy of the episcopal office, elevated to this see by the Lord Pope Benedict VIII at the king's request".
 The "Aberdeen Registrum" records a charter granted to Bishop Beóán by King Máel Coluim at Forfar, granting the bishop the churches and lands of Clova and the unidentified "Dulmech".
 The "Aberdeen Breviary" commemorated "Bishop Beóán" ("Beyn episcopus") as a saint on 26 October.
 Another Beóán, perhaps the one mentioned in the "Life of St. Cathróe of Metz", was commemorated on 16 December, and the two were often confused.
Ywain the Bastard, also called Ywain the Adventurous, is a son of King Urien of Gore and is a Knight of the Round Table in later Arthurian legend.
 He is often confused with his half-brother Sir Ywain, after whom he was named.
 While the older Ywain is the child of Urien and his wife Morgan le Fay, King Urien sired Ywain the Bastard on the wife of his seneschal.
 He is encountered frequently in Arthurian romance as a hearty and sensible warrior.
 His death comes at the hands of his cousin Gawain, ironically during the Quest for the Holy Grail.
 The two meet, disguised by their armor, and decide to joust.
 Ywain is mortally wounded, and it is not until Gawain takes him to a hermitage for his last rites that he realizes he has killed his own cousin.
Betula pubescens (syn.
 "Betula alba"), commonly known as downy birch and also as moor birch, white birch, European white birch or hairy birch, is a species of deciduous tree, native and abundant throughout northern Europe and northern Asia, growing farther north than any other broadleaf tree.
 It is closely related to, and often confused with, the silver birch ("B. pendula"), but grows in wetter places with heavier soils and poorer drainage; smaller trees can also be confused with the dwarf birch ("B. nana").
A queen post is a tension member in a truss that can span longer openings than a king post truss.
 A king post uses one central supporting post, whereas the queen post truss uses two.
 Even though it is a tension member, rather than a compression member, they are commonly still called a post.
 A queen post is often confused with a queen strut, one of two compression members in roof framing which do not form a truss in the engineering sense.
The 'Fresno Chili' pepper ( ) is a medium-sized cultivar of "Capsicum annuum."
 It should not be confused with the 'Fresno Bell' pepper.
 It is often confused with the Jalapeño pepper but contains thinner walls, often milder heat, and less time to maturity.
 It is however a New Mexico chile, which is genetically distinct from the Jalapeño and it grows point up, rather than point down as with the Jalapeño.
 The fruit starts out bright green changing to orange and red as fully matured.
 A mature Fresno pepper will be conical in shape, 2 inches long, and about 1 inch in diameter at the stem.
 The plants do well in warm to hot temperatures and dry climates with long sunny summer days and cool nights.
 They are very cold-sensitive, but disease resistant reaching a height of 24 to 30 inches.
Kamehameha II (c. 1797 – July 14, 1824) was the second king of the Kingdom of Hawaii.
 His birth name was Liholiho and full name was Kalaninui kua Liholiho i ke kapu ʻIolani.
 It was lengthened to Kalani Kaleiʻaimoku o Kaiwikapu o Laʻamea i Kauikawekiu Ahilapalapa Kealiʻi Kauinamoku o Kahekili Kalaninui i Mamao ʻIolani i Ka Liholiho when he took the throne.
Atys (Greek: Ἄτυς ) one of the sons of Manes along with Cotys, was the second king of Maeonia (later known as Lydia) and father of Lydus.
 He was the second king of the Atyad dynasty according to Herodotus.
James Young Kānehoa (1797–1851) was a member of the court of King Kamehameha II and Kamehameha III during the Kingdom of Hawaii.
 Sometimes he is confused with his half-brother John Kalaipaihala Young II known as Keoni Ana.