Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Germanic *ahwō

→ English ea (inherited)
→ English Salzburg (mention)
→ English eau (inherited)
→ English yeo (inherited)
→ English Vltava (mention)
→ English Eau (inherited)
→ Old English ea (inherited)
→ Old English ieg (mention)
→ Czech Vltava (mention)
→ Danish å (inherited)
→ German Aachen (cognate)
→ German Aller (mention)
→ German Fulda (mention)
→ Middle Dutch a (inherited)
→ Faroese á (derived)
→ Faroese oyggj (mention)
→ Old Danish a (inherited)
→ Gothic 𐌰𐍈𐌰 (inherited)
→ Icelandic á (inherited)
→ Dutch a (inherited)
→ Dutch IJ (derived)
→ Dutch Aa (inherited)
→ Dutch Altena (mention)
→ Norwegian Nynorsk å (inherited)
→ Old Norse á (inherited)
→ Old Norse ǫ́ (inherited)
→ Old Dutch a (inherited)
→ Old Saxon aha (inherited)
→ Swedish å (inherited)