Jastin is seldom used as a baby name for boys. It is not in the top 1000 names. Among the group of boy names directly related to Jastin, Justin was the most widely used in 2018.
Baby names that sound like Jastin include Jadan (English), Jaden (English), Jadin (English), Jadine, Jadyn (Spanish and English), Jadyne, Jaeden (English), Jaedin, Jaedyn, Jaidan, Jaiden (English), Jaidin, Jaidon (English), Jaidyn (English), Jateen, Jatein, Jatien, Jatin (Indian), Jatyn, and Jaydan.
† approx English pronunciation for Jastin: JH as in "joy (JH.OY)" ; AE as in "at (AE.T)" ; S as in "see (S.IY)" ; T as in "tee (T.IY)" ; IH as in "it (IH.T)" ; N as in "knee (N.IY)"