I need to update it. What I know now that I didn't know then was that Gaius Julius Alexander Berenicianus, listed there as a maternal grandson of Antiochus IV of Commegene and paternal grandson of Tigranes VI of Armenia, had married a woman named Cassia Lepida. Her mother is unknown but her father was Cassius Lepidus, the son of Junia Lepida and Gaius Cassius Longinus, who was Consul suffectus in 30 A.D. (The year I date the Crucifixion) and a direct descendant of the Gaius Cassius Longinus who was one of the assassins of Julius Caesar on the Ides of March 44 B.C. Junia Lepida was a descendant of Augustus's granddaughter Julia the Younger.
Berenicianus and Cassia Lepida had a daughter named Julia Cassia Alexandria who married Gaius Avidius Heliodorus. Their son was Gaius Avidius Cassius who was a brief Roman Usurper of the 2nd Century A.D. He had three children, Avidius Heliodorus, Avidius Maecianus, and Avidia Alexandra.
Tigranes VI of Armenia was of direct pater-lineal descent from Herod The Great and the Hasmoneans as shown in these family trees I made.
The next two family trees aren't my own, but taken from tyndalehouse, a very good site on the Ptolemaic Dynasty (Which intermarried with the Seleucids) though I disagree with them on some things.
Seleucid Family Tree
Continuation of Seleucid and Ptolemaic Lines
Now there is a new Seleucid-Genealogy website. They disagree with the Tyndale site on some things. Their different take on the Acheaus line intrigues me.
"The most complete proposal for a DFA is the Bagratid one. The route starts with Arsaces, the first of the Arsacids, flourishing ca. 250 BC. One of his descendants, king Tiridates III of Armenia, who reigned early in the 4th century, is known to have been ancestor of Nerses the Great. The latter's son Sahak I was the father-in-law of Hamazasp I, an Armenian ruler from the Mamikonian dynasty. Then the line can be traced, though not with certainty, to a much later Mamikonian, Samuel II of Armenia, whose son-in-law was Smbat VIII Bagratuni, Constable of Armenia and forefather of all the living Bagratids. The advantage of this route is that its crucial links (from Arsacids to Gregorids, from Gregorids to Mamikonids, and from Mamikonids to Bagratids) may be corroborated by near-contemporary sources, dating to within a century after the key marriages took place."The Above used to be on Wikipedia's Descent from Antiquity page. Wikipedia currently doesn't number any Smbat as VIII, but it's not uncommon for these numberings to be different in different sources. The Son in Law of Samuel II of Armenia is currently numbered as Smbat VII.
Ruben I who founded the Roupenian Dynasty of Armenian Cilicia in the Eleventh Century is generally agreed to have been a Bagratid relative and probably also descended from Smbat. Later Gabriel of Melitene is believed to be connected either by his wife or mother to Ruben I. Gabriel's daughter was Morphia of Melitene.
Tiridates III of Armenia was of direct Pater-lineal descent from Khosrov I of Armenia. Khosrov I was one of the sons born to King Vologases II of Armenia (Vagharsh II) who is also known as Vologases V of Parthia by an unnamed mother. Vologases was of direct pater-lineal descent from Vonones II of Parthia (Who is numbered Vonones I on the Tyndale site's genealogy). He and his brother where the sons of Darius son of Artavasdes of Media by a daughter of Antiochus I Theos of Commanege (another correction I need to make to my genealogy is that daughter was named Athenais not Iotapa). The wife of Darius is an unnamed Arascid princess, who may herself already be descended from earlier intermarriages between the Arascid and Seleucid dynasties.
The Bagratid dynasties have also claimed Davidic Descent.
Maria Taronitissa was probably of Bagratid descent via the Roupenians, she married John Doukas Komnenos a Duke of Cyprus who had descent from Byzantine Emperors. Their daughter Maria Komnene married Amalric I Crusader King of Jerusalem. All modern claimants to the Crusader King of Jerusalem title are descendants of that marriage.
Amalric's mother Mellisende of Jerusalem had ruled as Queen of Jerusalem. Her parents were Baldwin II of Jerusalem and his wife Morphia of Melitene who also descended from Armenian nobility. Another daughter of theirs was Alice of Antioch who married Bohemond II of Antioch and had a daughter, Constance of Antioch. Constance had a number of children from whom the Princes of Antioch descend, and a daughter, Agnes of Antioch. Agnes had 6 children, and from them descended all later kings of Hungry, and her daughter Constance of Hungry was the mother of Wenceslaus I of Bohemia.
Mary of Lusignan was the daughter of Hugh I of Cyprus and Alice of Champagne, daughter of Queen Isabella I of Jerusalem, daughter of Aalmric and Maria Komnene. She is an ancestor of modern British Royalty.
Elizabeth of York was the mother of Henry VIII, and his Sister who was an ancestor of both parents of King James Stuart VI of Scotland and I of England.Marie de Lusignan (1215-1251/3)Hugh, Count of Brienne (1240-1296)Walter V of Brienne (1278-1311)Isabella of Brienne (1306-1360), claimant to the Kingdom of JerusalemLouis of Enghien (d. 1394)Marguerite of Enghien (b. 1365) m. John of Luxembourg, Lord of BeauvoirPeter of Luxembourg, Count of Saint Pol (1390-1433)Jacquetta of Luxembourg, married Earl RiversElizabeth, Queen of England m. Edward IVElizabeth of York m. Henry VII
Returning to the subject of the Western branch. Avidius Heliodorus and other descendants of Antiochus IV of Commanege where based in Syria. At least two Syrian based Usurpers during the Crisis of the Third Century are also probably descended form them, Joptainians and one named Seleucus. The entire Aristocracy of Roman Syria (and surrounding regions) from the Second Century onward was Seleucid.
Eutropia was a woman of Syrian origin living in the late Third and early Fourth centuries AD. By her first husband she had Flavia Maximiana Theodora, who married Constantius I Chlorus, and was the mother of all his children except Constantine I. However her much younger daughter by her second husband Fausta married Constantine I. By the mid Fourth Century the entire Constantinian dynasty was descended from Eutropia. I suspect it's through the Constantinians that the Merovingian dynasty (as well as other early Western European dynasties) can be traced back to the Seleucids, but I can't prove it yet.