Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
brath
←
Proto-Celtic
*brātu
(inherited)
←
Proto-Indo-European
*gʷerH-
(inherited)
←
Old Irish
brath
(inherited)
←
Old Irish
mrath
(mention)
←
Old Irish
mbrath
(mention)
→
Scottish Gaelic
mearachd
(mention)