Meaning and name origin
Mostyn is not a popular first name for males but a somewhat popular surname or last name for all people (#46186 out of 88799, Top 52%) (Source: 2000 U.S. Population Census).
Displayed below is the baby name popularity of the name Mostyn for boys. Mostyn has not been ranked in the Top 1000/100 so far. (Source: 2014 Birth Name Statistics).