Courageous or valiant
Rielly is a spelling variant of the Irish surname Reilly, which is derived from the Gaelic name Γ Raghallaigh. It traditionally signifies a descendant of Raghallach, a name thought to mean 'gregarious' or 'valiant'. While less common than Riley, this spelling retains the energetic and friendly spirit of its roots.
Less common today
Rielly isn't in the latest US Top 1000. It last peaked at #4,291 in 2002.
American actor known for various television roles
US births per 5-year period, 1990βpresent (SSA data).