Baby Names Gender-Neutral Names Meaning of the Name Mostyn Updated January 14, 2026 by Jennifer M. Mostyn Gender: Neutral Origin: Welsh Meaning: From The Mossy Town ♥ Add to my Namelist What is the meaning of the name Mostyn? The name Mostyn is primarily a gender-neutral name of Welsh origin that means From The Mossy Town. People who like the name Mostyn also like: Landon, Holden, Sinjin, Taran, Ray, Jasper, Finn, Aislin, Acelynn, Audrey, Cali, Jaelyn, Faye, Aderyn Names like Mostyn: Maxton, Muqaddim, Moonstone, Maston Stats for the Name Mostyn Mostyn is currently not in the top 100 on the Baby Names Popularity Charts Mostyn is currently not ranked in U.S. births