Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dá
←
Proto-Celtic
*dwau
(inherited)
←
Proto-Indo-European
*dwóh₁
(inherited)
→
Irish
dhá
(inherited)
→
Scottish Gaelic
dà
(inherited)
→
Scottish Gaelic
dhà
(inherited)
→
Manx
daa
(inherited)
→
Old Irish
Glenn Dá Locha
(compound)