Mersey \m(e)-rsey, mer-sey\ as a girl's name (also used as boy's name Mersey), is a variant of Mercy (English), and the meaning of Mersey is "compassion, forebearance".

The baby name Mersey sounds like Marsey and Mercey. Other similar baby names are Darsey, Dorsey, Maisey, Marsee, Marcey, Marjey, Margey, Marley, Marney, Meriel, Merced, Mercer, Merry, Merle, Merree, Mersera and Merel.