Josiah is of Hebrew origin, meaning 'God supports' or ' Supported by God'. It was borne by several figures in the Bible, notably King Josiah of Judah, who implemented religious reforms during his reign.
"Josiah saw its peak popularity between 1997 and 2004, with a high of 21 births in 2006. However, it has remained consistently popular since then, with no year falling below 10 births."