Meaning and name origin
Josia \j(o)-sia\ as a boy's name is of Hebrew origin, and the meaning of Josia is "Jehovah helps". Josia is a variant of Josiah (Hebrew); biblical: king of Judah at age eight after his father was assassinated, Josiah ruled well for 31 years.
Josia is not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Josia and its source form. The only popular variation form ranked in the Top 1000/100 is Josiah (#64). (2014 statistics).
Josia is also pronounced similarly to Josua. Other suggested similar baby names are Jasha, Jesiah, Jose, Josh, Joshua, Josias, Josif, Josip, Joss, Josue, Joziah and Jozua. These names tend to be more commonly used than Josia.