Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
markiagh
←
Irish
-
(cognate)
←
Scottish Gaelic
-
(cognate)
←
Manx
markiaght
(mention)
←
Old Irish
marcaigecht
(derived)
←
Old Irish
marcach
(cognate)