Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
axudar
←
Asturian
axudar
(cognate)
←
Spanish
ayudar
(cognate)
←
Latin
adiūtāre
(inherited)
←
Latin
adiūtō
(mention)
←
Portuguese
ajudar
(cognate)
←
Old Portuguese
ajudar
(inherited)
→
Galician
axuda
(back-formation)
→
Galician
axuda
(link)