- Welsh English
- Penhallurick (1991: 57) records examples of [s] plurals added to a stem in which final [f] remains, owing to the tendency to unvoicing found in northern WelE combined with absence of [z] in Welsh. Note, however, that Parry (1999: 105) records calfs and sheafs elsewhere in Wales, including areas with long-standing influence from English English dialects.
- Penhallurick, Robert J. 1991: 157; Parry, David 1999: 105