Yishai \yi-shai\ as a boy's name is a variant of Jesse (Hebrew), and the meaning of Yishai is "the Lord exists".

The baby name Yishai sounds like Jasha, Ash, Ashe, Isiah, Isia, Jascha, Jesiah, Joshua, Joshuah, Josh, Josiah, Josia and O'Shay. Other similar baby names are Lisha and Misha.