Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
mam
←
Proto-Celtic
*mammā
(cognate)
←
Old Irish
muimme
(cognate)
→
English
mama
(cognate)
→
Irish
mamach
(affix)