Władysław Jagiełło has a son with Anna of Cili

Władysław II Jagiełło, King of Poland and Supreme Duke of Lithuania has a healthly son born in 1408 (instead of daughter Hedwig) named Władysław after father. IOTL Jadwiga/Hedwig was proclaimed heiress to Polish throne in 1413 during congress of Jedlnia. It should be even easier with son (whose mother, unlike OTL fourth wife of Jagiełło, Sonka of Halshany is descendant of Polish kings, granddaughter of Casimir the Great). And Jogaila has another option to secure Polish crown for his son-he only need to make him Grand Duke of Lithuania after Vytautas' death, it is almost guaranteed that Poles would elect to the throne ruler of Lithuania. Jogaila ITTL would never decide to make his brother Švitrigaila Grand Duke after Vytautas if he has adult son by the time of his cousin's death. That's mean trouble with Švitrigaila, but he really troublesome IOTL and would still ally with Teutonic Knights to get Ducal throne for himself. Due to fact that he relied on support of Orthodox Ruthenian population of GDL he'll still be unpopular among Catholic Lithuanians, perhaps ITTL he'll be assassinated successfuly. Question is what would Žygimantas Kęstutaitis do? Would he stay loyal to Jogaila's son? Young Władysław would not have easy life, Švitrigaila's supporters would propably try to assassinate him instead of Žygimantas (unless Švitrigaila is killed earlier, which is IMHO likely), but if he is as capable like OTL Casimir IV he should succeed in his struggle for both thrones, or once elected to Polish throne he'll made someone ( likely Žygimantas or his son Mykolas) his hand in Lithuania keeping title of Supreme Duke?
In Poland last years of Jogaila's rule should be more effective if monarch don't need to put so much energy in securing throne for his son. So less priviledges for nobles and more support for Hussites? And of course after Jogaila's death bishop Zbigniew Oleśnicki would never achieve his OTL position-no need for regency with 26 years old heir to the throne. So Poland would not get closer to Emperor (IOTL hatred towards Hussites and Turks and support for conciliarism in Catholic Church shared by Sigismund of Luxembourg and bishhop Oleśnicki caused shift in Polish foreign politics during miniority of Jogaila's sons, something that would likely not happen ITTL, so maybe campaign to get Czech throne for Jagiellon after Sigismund's death would be more successful ITTL?)
 
So say that Władysław III accepts Czech invitation to the throne in 1438, his campaign is better prepared than the one from OTL because Oleśnicki has (who hated idea of Jagiellon taking throne of "heretic' kingdom) have less influence in Poland. Władysław OTOH is not as much interested in Hungarian Crown which is taken by TTL Ladislaus the Posthumous analogue (who still dies young and then Hunyadi family takes power in Hungary). TTL Jagiellons have no claims to Hungarian throne so Hunyadi-Jagiellon alliance against Habsburg claims to Bohemia and Hungary is created.

Władysław III (1408-1469), Grand Duke of Lithuania since 1430, King of Poland since 1434, King of Bohemia since 1438. Marries Magdalene Hohenzollern (born 1412), daughter of Frederick I, Elector of Brandenburg.
Children:
Władysław IV (1430-1476) King of Poland 1469-1476
Kazimierz "The Older"(1432-1437)
Fryderyk (1433-1489) King of Bohemia 1469-1489
Jadwiga (1436-1444)
Aleksander (1438-1497) Grand Duke of Lithuania 1469-1497, King of Poland 1477-1497
Kazimierz "The Younger" 1440-1499, bishop of Cracow, archbishop of Gniezno, cardinal.
Elżbieta (1443-1506) married Ladislas VI Hunyadi, King of Hungary
 
So say that Władysław III accepts Czech invitation to the throne in 1438, his campaign is better prepared than the one from OTL because Oleśnicki has (who hated idea of Jagiellon taking throne of "heretic' kingdom) have less influence in Poland. Władysław OTOH is not as much interested in Hungarian Crown which is taken by TTL Ladislaus the Posthumous analogue (who still dies young and then Hunyadi family takes power in Hungary). TTL Jagiellons have no claims to Hungarian throne so Hunyadi-Jagiellon alliance against Habsburg claims to Bohemia and Hungary is created.

Władysław III (1408-1469), Grand Duke of Lithuania since 1430, King of Poland since 1434, King of Bohemia since 1438. Marries Magdalene Hohenzollern (born 1412), daughter of Frederick I, Elector of Brandenburg.
Children:
Władysław IV (1430-1476) King of Poland 1469-1476
Kazimierz "The Older"(1432-1437)
Fryderyk (1433-1489) King of Bohemia 1469-1489
Jadwiga (1436-1444)
Aleksander (1438-1497) Grand Duke of Lithuania 1469-1497, King of Poland 1477-1497
Kazimierz "The Younger" 1440-1499, bishop of Cracow, archbishop of Gniezno, cardinal.
Elżbieta (1443-1506) married Ladislas VI Hunyadi, King of Hungary

Wouldn't want to tussle with this monster (Poland-Bohemia allied to Hungary). I'd love to see a TL done on this. Are you planning one?
 
Wouldn't want to tussle with this monster (Poland-Bohemia allied to Hungary). I'd love to see a TL done on this. Are you planning one?
I'd like to do it one day, now I only have (still fluid) idea (I'm still not sure about situation in Czech Kingdom. Perhaps Władysław III takes throne of Bohemia after death of Albrecht Habsburg and let Elisabeth of Luxembourg and her infant son rule Hungary (so there is reverse of OTL situation where Władysław of Varna took Hungarian throne)? Good thing for Poland is the fact that Oleśnicki is out of picture.
 
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