Paynim
(based on 10 occurrences of p/Paynim(s) and on the fact that the alternate spelling would significantly change the pronunciation)
seige (p. [326])
siege
Launclot (p. [364])
Launcelot
(based on 2447 occurrences of Launcelot and only one occurrence of Launclot)
Pertipole ([Index])
Pertilope
Servause le Breuse ([Index])