Wathiq
While the root word appears in Quranic verses describing trust in God, the specific name form Wathiq is not used as a proper noun in the Quran.
Al-Wathiq bi-llah was an Abbasid caliph (842-847 CE), giving the name historical legitimacy in Islamic civilization.
Wathiq describes the state of being confident/trusting, while Tawakkul is the act of trust; Wathiq is a personal attribute name.
Yes, though rare, it carries strong positive connotations of reliability and faith, making it distinctive for modern Muslim boys.
Historically used in Arab and Persian scholarly families, with occasional usage in Urdu-speaking regions of South Asia.