Meaning and name origin
Isais \i-sais\ as a boy's name is of Hebrew origin, and the meaning of Isais is "God is salvation". Isais is a variant of Isaiah (Hebrew); biblical: one of the major prophets and writer of the Book of Isaiah. A birth name that is not commonly used.
Isais is not a popular first name for males but a very popular surname or last name for all people (#37756 out of 88799, Top 43%) (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the boy name Isais and its variant forms. Popular variation forms ranked in the Top 1000/100 are Isaiah (#48), Izaiah (#459) and Isiah. (Source: 2014 Birth Name Statistics).