Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
a
←
Proto-Brythonic
*(h)a
(inherited)
←
Welsh
à
(link)
←
Welsh
á
(link)
←
Welsh
â
(link)
←
Welsh
ä
(link)
←
Welsh
af
(link)
←
Welsh
ag
(cognate)
←
Welsh
ac
(link)
←
Proto-Indo-European
*ad-gʰe
(inherited)
←
Cornish
ha
(cognate)
←
Old Welsh
ha
(inherited(cy/wlm))
←
Old Welsh
a
(inherited)
→
English
cant
(link)
→
Breton
ha
(cognate)
→
Welsh
â
(mention)
→
Welsh
thi
(mention)
→
Welsh
efo
(compound)
→
Welsh
hefo
(compound)
→
Welsh
efallai
(compound)
→
Welsh
Jac a'i Wagen
(compound)
→
Welsh
hyn a hyn
(compound)
→
Welsh
deg a thrigain
(compound)
→
Welsh
deg a phedwar ugain
(compound)
→
Welsh
pedwar ar bymtheg a phedwar ugain
(compound)
→
Welsh
pedwerydd ar bymtheg a phedwar ugain
(compound)
→
Scottish Gaelic
a
(cognate)
→
Cornish
ha
(cognate)
→
Old Irish
a
(cognate)
→
Old Irish
a/Old Irish
(cognate)