There is Charles and Maximilian instead of Charles and Ferdinand-sons of Philip & Juana are not expected to inherit Spain until 1506 and both are born in Brussels, which is interesting change: Ferdinand of Aragon can't threaten his older grandson that he'll disinherit him in favour of younger...
Posthumous daughter of Juan de Asturias lives few years. Margaret never marries Philibert of Savoy and Philip Habsburg (who lives a bit longer, as he came to Spain for the first time in 1507) & Juana inherit Spain a bit later and all their children are born in Low Countries ITTL.
Margaret of...
He wanted a lot of things, which contradicted themselves. And his desire to be seen as the saviour of the Poles ended badly, for Poles too.
BTW I think Augenis once envisioned GDL separated from Poland "proper" to develop similarily to OTL Finland (with Polish speaking Lithuanians as analogue...
Catholic Russia is indeed very likely to turn Protestant at some point-Rome is far away and Russia's rulers would want to have control over the Church. Russian Henry VIII is more than plausible.
Margaret of Angoulême, mother of five queens and one king.
Francis I dies young, meanwhile his sister has issue with more capable version of Duke of Alençon:
Charles (1459-1496) Count of Angoulême, m. Louise of Savoy (1476-1531)
1) Margaret (1492-1549) m. Charles IV of Alençon/IX of France...
There was no single view on the matter, as even fraction of Hungarians preffered adult Ulaszlo I over baby Laszlo V, despite fact, that the latter was son of the King of Hungary while the former had no ties at all to Hungary.
Zamoyski would write pamphlets to explain why electing Sigismund Augustus' infant son, if there was any, is better than adult Habsburg, who would bring tyranny and ultra-Catholic fanatism.
But child king is in fact a way to erode royal power, especially if happens few times in row. Same with absent monarch.
OTOH kings of Poland either had adult son or no sons at all when they died. Jogaila was exception. If, say, Sigismund Augustus left 10 years old son, whom Lithuanians would...
Frederick stated, that as Habsburg he is legal successor of Ladislaus anyway. Meanwhile Czechs and Hungarians simply ignored him and Ladislaus' sisters alike, because Bohemian and Hungarian thrones were elective and their nobles didn't want him on the throne and he could not do anything about...
Older Mary of Burgundy:
Catherine of France (1428-1463) m. Charles (1433-1482) Duke of Burgundy
1) Mary (1450-1502) Duchess of Burgundy, m. Nicholas (1448-1478) Duke of Lorraine
1) Philip IV (1468-1532) Duke of Lorraine, Burgundy and Anjou, m. Elizabeth of England (1466-1524)
2) Mary...
Polish-Soviet border in Prussia could be further north:
https://www.alternatehistory.com/forum/threads/proposals-and-war-aims-that-didnt-happen-map-thread.317821/page-285#post-24326829
And if Stalin died a bit earlier border between Poland and Ukrainian SSR would be a bit different...
Twins of Burgundy (Mary of Burgundy has twin brother):
Philip IV (1457-1503) Duke of Burgundy, m. Anne of France (1461-1522)
1) Charles II (1477-1533) Duke of Burgundy 1503, m. a) Anne of England (1475-1511), b) Anne of Cleves (1495-1567)
2) Philip (1480-1481)
3) Mary (1483)
4) Anne...