Sadiq is an Arabic name meaning truthful, sincere, or loyal.
Sadiq is a classical Arabic name built on the root ṣ-d-q, carrying the meaning "truthful," "sincere," or "honest" — virtues so prized in Islamic ethical thought that al-Ṣādiq, "the Truthful," became one of the honored epithets applied to the Prophet Muhammad. The name thus carries theological weight even in purely secular contexts: to be named Sadiq is, etymologically, to bear a moral charge. Perhaps the most revered historical bearer is Ja'far al-Ṣādiq (702–765 CE), the sixth Imam in Twelver Shia Islam and a towering figure in Islamic jurisprudence, theology, and what would become early Islamic science.
His students included the founders of the Maliki and Hanafi legal schools, and his intellectual breadth was extraordinary — he is credited with insights in alchemy, astronomy, and medicine centuries before their European equivalents. In Sudan, Sadiq al-Mahdi served twice as Prime Minister and remained one of the country's most influential political figures into the twenty-first century. More recently, Sadiq Khan's election as Mayor of London in 2016 — the first Muslim mayor of a major Western capital — brought the name to global headlines.
Across the Muslim world from West Africa to South Asia, Sadiq has remained in steady use for over a millennium. It carries a kind of quiet authority: it is not showy, but it is deeply purposeful. In diaspora communities it often becomes a subtle declaration of values as much as an identity marker, a name that answers the question "what do we hope this child will be?" with a single, unambiguous word.