Alexius \a-lexius\ as a girl's name (also used as boy's name Alexius), is a variant of Alexis (Greek), and the meaning of Alexius is "defender, protector".

The baby name Alexius sounds like Alexus, Alexine, Alexina, Alexie, Alexia, Alexi and Alexys. Other similar baby names are Alex, Allexine, Allexina, Alexene, Alexena, Alexea, Alexa, Lexis and Lexus.