Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Middle High German -er

→ Bavarian -er (inherited)
→ German -er (mention)
→ German -er (inherited)
→ Old High German -o (mention)
→ Old High German -ari (link)
→ Polish kuśnierz (affix)
→ Yiddish ־ער (mention)