Abu-l-Hasan Ali ibn Ruburtayr or Reverter (Arabic: أبو الحسن علي ابن رويبتر) (?
– 1187 in El-Omra, Tounes) was the younger son of Reverter I viscount of Barcelona, and a Muslim Catalan mercenary commander.
When his father died in 1142 or 1144, he became leader of the Christian mercenary regiment of Tashfin ibn Ali, the Almoravid Sultan of Maghreb and Al-Andalus.
In 1183[2] the Sultan Yaqub al-Mansur sent him to Al-Mayurqa in order to take the island from the Banu Ghaniya, but he was captured by the Almoravid admiral Ali ibn Maymun, who was positioned against the Almohad rule.
[2] Ibn Ruburtayr managed to escape and to turn the island in favour of his master, until he placed a sovereign submitted to the Almohads on the throne.