List of French monarchs
House of Capet (987–1328)

Portrait
Coat of arms
Name
King from
King until
Relationship with predecessor(s)
Title
-
-
Hugh Capet
3 July 987
24 October 996
Grandson of Robert I
King of the Franks (Roi des Francs)
-
-
Robert II the Pious, the Wise
24 October 996
20 July 1031
Son of Hugh Capet
King of the Franks (Roi des Francs)
-
-
Henry I (Henri)
20 July 1031
4 August 1060
Son of Robert II
King of the Franks (Roi des Francs)
-
-
Philip I the Amorous (Philippe)
4 August 1060
29 July 1108
Son of Henry I
King of the Franks (Roi des Francs)
-
-
Louis VI the Fat
29 July 1108
1 August 1137
Son of Philip I
King of the Franks (Roi des Francs)
-
-
Louis VII the Young
1 August 1137
18 September 1180
Son of Louis VI
King of the Franks (Roi des Francs)
-
-
Philip II Augustus (Philippe Auguste)
18 September 1180
14 July 1223
Son of Louis VII
King of the Franks (Roi des Francs) King of France (Roi de France)
-
-
Louis VIII the Lion
14 July 1223
8 November 1226
Son of Philip II Augustus
King of France (Roi de France)
-
-
Louis IX the Saint (Saint Louis)
8 November 1226
25 August 1270
Son of Louis VIII
King of France (Roi de France)
-
-
Philip III the Bold (Philippe)
25 August 1270
5 October 1285
Son of Louis IX
King of France (Roi de France)
-
-
Philip IV the Fair, the Iron King (Philippe)
5 October 1285
29 November 1314
Son of Philip III
King of France and of Navarre (Roi de France et de Navarre)
-
-
Louis X the Quarreller
29 November 1314
5 June 1316
Son of Philip IV
King of France and of Navarre (Roi de France et de Navarre)
-
-
John I the Posthumous (Jean)
15 November 1316
20 November 1316
Son of Louis X
King of France and of Navarre (Roi de France et de Navarre)
-
-
Philip V the Tall (Philippe)
20 November 1316
3 January 1322
Son of Philip IV Younger brother of Louis X
King of France and of Navarre (Roi de France et de Navarre)
-
-
Charles IV the Fair
3 January 1322
1 February 1328
Son of Philip IV Younger brother of Louis X and Philip V
King of France and of Navarre (Roi de France et de Navarre)

Question: Who was the son of Louis X?
Answer: John I (15–20 November 1316), called the Posthumous, was King of France and Navarre, as the son and successor of Louis X.