According to "The Latins in the Levant. A History of Frankish Greece (1204–1566)" by William Miller, the seven brothers may also have had a sister, the wife of Marco I Sanudo and mother of Angelo Sanudo.
At about the same time his brother Constantine Laskaris was unsuccessfully proclaimed emperor by some of the defenders of Constantinople.
Constantine | Constantine the Great | Grand Duke Constantine Pavlovich of Russia | Constantine, Algeria | Larry Constantine | Constantine VII | Constantine I of Greece | Constantine II (emperor) | Constantine II | Susannah Constantine | Learie Constantine | Constantine II of Greece | Michael Constantine | Constantine P. Cavafy | Constantine, Michigan | Niš Constantine the Great Airport | Eddie Constantine | Constantine VIII | Constantine V | Constantine Scollen | Theodore I Laskaris | John Constantine | Constantine Phipps, 2nd Baron Mulgrave | Siege of Constantine | Laskaris | Constantine the African | Constantine Samuel Rafinesque | Constantine Phipps, 1st Marquess of Normanby | Constantine Orbelian | Constantine II, King of Armenia |