Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
leann
←
Breton
lenn
(cognate)
←
Gaulish
linna
(cognate)
←
Proto-Celtic
*linnā
(inherited)
←
Welsh
llen
(cognate)
←
Irish
lionn
(doublet)
←
Irish
lionn
(alter)
←
Irish
(alter)
←
Irish
Munster
(alter)
←
Irish
leann donn
(link)
←
Irish
leann dubh
(link)
←
Irish
leann sinséir
(link)
←
Irish
leann úll
(link)
←
Irish
teach leanna
(link)
←
Irish
leann pailme
(link)
←
Irish
leann piorra
(link)
←
Irish
leann fraoigh
(link)
←
Irish
leann bó
(link)
←
Irish
leann táith
(link)
←
Irish
seomra leanna
(link)
←
Irish
leannlus
(link)
←
Irish
lus an leanna
(link)
←
Cornish
len
(cognate)
←
Old Irish
linn
(inherited)
←
Old Irish
lenn
(inherited)
→
English
Lenahan
(mention)
→
Breton
lenn
(cognate)
→
Welsh
llen
(cognate)
→
Irish
lionn
(doublet)
→
Irish
leann úll
(compound)