Ibn al-Riḍā (Arabic: ابن الرضا) (literally, the son of Rida) is a title for male descendants of Imam al-Rida (a), the most famous of whom were Imam al-Jawad (a), Imam al-Hadi (a) and Imam Hasan al-'Askari (a). Musa al-Mubarqa', the son of Imam al-Jawad (a) was also among those who was called Ibn al-Rida. This title was used by the companions of Imams (a) and others especially Banu 'Abbas.
About the reason of using this title, some have said that Banu 'Abbas called descendants of Imam al-Rida (a), "Ibn al-Rida" to show that these people were attributed to a person who had accepted crown princeship and had a tendency toward the material world. Another reason for the prevalence of this title was that the reputation of Imam al-Rida (a) for his scholarly debates with theological and religious sects among other denominations made his descendants be known as "Ibn al-Rida".
- The material for this article is mainly taken from ابن الرضا in Farsi WikiShia.