Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Mervyn
←
Welsh
Merfyn
(mention)
←
Welsh
mer
(mention)
←
Welsh
myn
(mention)
→
English
Mervin
(mention)