What is "laskaris"

The Laskaris or Lascaris family was a Byzantine Greek noble family whose members formed the ruling dynasty of the Empire of Nicaea from 1204 to 1261 and remained among the senior nobility up to the dissolution of the Byzantine Empire, whereupon many emigrated to Italy and then to Smyrna (much later). According to George Pachymeres, they were also called Tzamantouros (Tζαμάντουρος). The feminine form of the name is Laskarina (Λασκαρίνα).