Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llwy
←
Breton
loa
(cognate)
←
Breton
loé
(mention)
←
Breton
lui
(mention)
←
Proto-Brythonic
*lluɨɣ
(inherited)
←
Proto-Celtic
*lēgā
(inherited)
←
Cornish
lo
(cognate)
→
Welsh
llwyaid
(affix)
→
Welsh
llwy gawl
(compound)
→
Welsh
llwy fwrdd
(compound)
→
Welsh
llwy ford
(compound)
→
Welsh
llwy de
(compound)
→
Irish
liach
(cognate)
→
Scottish Gaelic
liogh
(cognate)
→
Manx
lheegh
(cognate)
→
Cornish
lo
(cognate)