WI: Ladislaus the Posthumous Survives

So I'm guessing that most of the Albertine possessions were in Lower/Upper Austria then? Would these lands eventually be seen as part of the Hungarian kingdom or would they remain distinct entities.
They would certainly remain distinct entities, atleast legally. On the other hand, OTL everyone always just simply say Austria, when they talk about the Habsburg monarchy, even though it couldn't be more incorrect. This could also happen in this sceniario, albeit reversed.
 
A Family Tree
I figure it's time for one of these, since I needed to see it in my head. This is c.1470 (I know Max only married Marie of Burgundy in 1477 OTL, but I just included it to show that they are getting married).

Albrecht II ‘der Weise’, Duke of Austria, Styria, Carinthia, Carniola [1330-1358], Count of Pfirt [1324-1358] (1298-1358) m: 1324 Johanna, Countess of Pfirt (1300-1351)

1) Rudolf IV, Duke of Austria, Styria, Carinthia & Carniola [(as Rudolf IV)1358-1402] (1339-1365) m: 1356 Katherina of Bohemia(1342-1395)

2) Friedrich III, Duke of Carinthia [1358-1362] (1347-1362)

3) Albrecht III ‘mit dem Copfe’, Duke of Austria, Styria [1365-1395], Inner Istria & the Windisch Mark [1374-1395] (1348-1395) 1m: 1366 Elisabeth of Bohemia (1358-1373); 2m: 1375 Beatrix of Nürnberg (1362-1414)

a) Albrecht IV ‘das Weltwunder’, Duke of Austria [1395-1404] (1377-1404) m: 1390 Johanna of Bavaria (1377-1410)

i) Margarethe (1395-1447) m: 1412 Heinrich XVI, Duke of Bavaria-Landshut (1386-1450)

ii) Albrecht V, King of Hungary & Bohemia [1437-1439], Duke of Austria [1404-1439] (1397-1439) m: 1422 Eliska of Bohemia (1409-1442)

(1) Georg (1431-1435)

(2) Anna (b. 1432) m: 1446 Wilhelm of Saxony (b.1425)

(3) Elisabeth (b.1435) m: 1454 Kasimir IV, King of Poland, Grand Duke of Lithuania (b. 1427)

(4) Ladislaus, King of Hungary (as László V) & Bohemia [from 1453] (b.1440) 1m: 1453 Anna Garai (1440-1457); 2m: 1459 Madeleine de Valois (b.1443)

(a) [1m.] Ladislaus (László), Duke of Austria (b.1457)

(b) [2m.] Elisabeth (b.1460)

(c) [2m.] Katharina (b.1464)

(d) [2m.] Karl, Duke of Austria (b.1465)

(e) [2m.] Magdalene (b.1467)​


4) Leopold III ‘der’, Duke of Austria, Styria [1365-1386] Carinthia, Carniola & South Tyrol [1379-1386] (1351-1386) m: 1365 Verde Visconti (1350-1414)

a) Wilhelm, Duke of Styria, Carinthia & Tyrol [1386-1406] (1370-1406) m: 1391 Giovanna II, Queen of Naples (1373-1435)

b) Leopold IV ‘der Stolze’, Duke of Styria [1406-1411] (1371-1411) m: 1393 Catherine of Burgundy (1378-1425)

c) Ernst I ‘der Eiserne’, Duke of Styria [1411-1424], Carinthia, Carniola & Tyrol [1406-1424] (1377-1424) 1m: Margarethe of Pomerania (1366-1410); 2m: 1412 Cymburgis of Masovia (1394-1429)

i) [2m.] Friedrich V, Archduke of Austria [from 1453], Duke of Styria, Carinthia & Carniola [from 1424] (b.1415) m: 1452 Leonor of Portugal (b.1436)

(1) Christoph, Archduke of Austria (1455-1456)

(2) Maximilian, Archduke of Austria (b.1459) m: 1477 Marie, Duchess of Burgundy etc (b.1457)

(3) Helene (1460-1461)

(4) Kunigunde (b.1465)

(5) Johann, Archduke of Austria (1466-1467)​

ii) [2m.] Margarethe (b.1416) m: 1431 Friedrich II, Elector of Saxony (1412-1464)

iii) [2m.] Albrecht VI, Archduke of Austria [1453-1463] (1418-1463) m: 1458 Mathilde of the Palatinate (b.1419)

iv) [2m.] Alexander (d.1420)

v) [2m.] Rudolf (d.1424)

vi) [2m.] Katharina (b.1424) m: 1447 Karl I, Margrave of Baden (b.1427)

vii) [2m.] Leopold (d.1424)

viii) [2m.] Anna (d.1429)

ix) [2m.] Ernst (d.1432)​

d) Elisabeth (1378-1392)

e) Friedrich IV ‘mit dem Leer Taschen’, Duke of Tyrol [1402-1439] (1382-1439) 1m: 1407 Elisabeth of the Palatinate (1381-1408); 2m: 1411 Anna of Brunswick-Göttingen (1390-1432)

i) [1m.] Elisabeth (1408-1408)

ii) [2m.] Margarethe (1423-1424)

iii) [2m.] Hedwig (1424-1427)

iv) [2m.] Wolfgang (1426)

v) [2m.] Sigmund, Archduke of Austria [1453-1496], Duke of Tyrol (b.1427) 1m: 1447 Radegonde of France (1425-1448); 2m: 1449 Eleanor of Scots (b.1433)​

f) Katharina (b.1385, d.?)​
 
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