John of Aragon and Sicily, Duke of Athens and Neopatras, Regent of Sicily, Count of Malta

• https://es.wikipedia.org/wiki/Juan_de_Sicilia_y_Anjou
• https://it.wikipedia.org/wiki/Giovanni_d%27Aragona_(1317-1348)_

Descent

Giovanni da Cesarina had three children [4] [5] :

1. Federico ( 1340 - 11 July 1355 ), from 1348 , duke of Athens and of Neopatria, was buried in the cathedral of Palermo ;
2. Eleonora ( 1346 - 1405 ) became countess consort of Caltabellotta , marrying Guglielmo Peralta , count of Caltabellotta ;
3. Constanza.

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http://fmg.ac/Projects/MedLands/SICILY.htm#PietroIIdied1342B%23ES

 King Federigo & his wife had nine children:

7. GIOVANNI of Sicily (Apr/May 1317-Catania 3 Apr 1348). The Crónica de San Juan de la Peña names "el primero…Don Pedro…et el otro Don Johan…el tercero Guillem" as the three sons of Federigo King of Sicily, stating that Giovanni was "Duch de Atenas"[725]. Marchese di Randazzo. He succeeded his brother 1338 as Duke of Athens and Neopatras, although he never visited the territory. Regent of Sicily 1338-1348. He died of the plague. m CESARINA [Cesarea] Lancia, daughter of PIETRO Lancia Signor di Delia, Conte di Caltanissetta & his wife --- d'Alagón.

 Giovanni & his wife had three children: 

• a) FEDERIGO de Aragón ([1340]-11 Jul 1355, bur Santa Agata Palermo). He succeeded his father in 1348 as Duke of Athens and Neopatras.
• b) LEONOR de Aragón ([1346]-after 1369). m GUILLÉN de Peralta Conde de Castelbellotta.
• c) CONSTANZA de Aragón