Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llam
←
Proto-Celtic
*lanxsman
(inherited)
←
Middle Welsh
llam
(inherited)
→
Welsh
adlam
(affix)
→
Irish
léim
(cognate)
→
Scottish Gaelic
leum
(cognate)
→
Old Irish
léimm
(cognate)