Gainor \ga(i)-nor\ as a boy's name is a variant of Gaynor (Irish, Gaelic), and the meaning of Gainor is "son of the fair-skinned one".
The baby name Gainor sounds like Gainer, Gaynnor and Gayner. Other similar baby names are Rainor, Gaines, Gains, Gair, Gannon, Garner, Garnar, Gaylor, Gaine, Maynor, Minor, Meinor, Raynor, Rainer and Ragnor.