Keallan \ke(al)-lan\ as a boy's name is a variant of Keelan (Irish, Gaelic), and the meaning of Keallan is "small, slim".
The baby name Keallan sounds like Keillan, Keallin, Kealan and Kellan. Other similar baby names are Callan, Dallan, Kaelan, Kellen, Kalan, Karlan, Keagan, Kelan, Keilan, Kellin, Kelvan, Mellan and Tallan.