Reilly \re(il)-ly\ as a girl's name (also used as boy's name Reilly), is a variant of Riley (Irish, Gaelic), and the meaning of Reilly is "courageous".

The baby name Reilly sounds like Reilley, Railey, Rella and Rilla. Other similar baby names are Delly, Milly, Bailly, Billy, Cilly, Nelly, Gilly, Hilly, Jilly, Kelly, Lilly, Tilly, Melly, Neille, Neilla, Philly, Teille, Teill and Willy.