I think that the name written is Mafis. For the final S compare with the Francis Harris marriage on the same page March 12th 1713.
As they were married by licence you should be able to find the entry in the Bishops Act books at the Devon Heritage Centre & compare her name there. The reference or the correct volume is:
DEX/1/b/8 Act Book Volume 8 1704- 1719
Furthermore also at the Devon Heritage Centre is the library of the Devon & Cornwall Record Society which has transcripts of the Devon marriage licences granted, using either of the above you may if it has survived find a copy of the licence bond or allegation, which also give the name of the bride.
Quote from the Devon Heritage Centre Catalogue
Marriage Bonds and Allegations: documents prior to the issue of a Licence
“The Exeter Diocesan marriage bonds and allegations, covering the years 1660 to 1842, were sorted some years ago into chronological (date) series for Devon (held in 169 boxes) and a separate series for Cornwall (held in 32 boxes). The Exeter marriage bonds have a maximum date range of December 1660 to October 1823 for Devon........”
