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

→ English who (derived)
→ Old English hwa (derived)
→ Corsican chì (inherited)
→ Czech kdo (inherited)
→ Kashubian chto (inherited)
→ Old Church Slavonic къто (derived)
→ Welsh neb (derived)
→ Welsh pan (inherited)
→ Danish hvem (inherited)
→ Lower Sorbian chto (derived)
→ Greek πότε (mention)
→ Middle English who (inherited)
→ Ancient Greek πότε (mention)
→ Ancient Greek πότερος (suffix)
→ Ancient Greek πόθεν (derived)
→ Ancient Greek ποθι (mention)
→ Ancient Greek πόσε (mention)
→ Ancient Greek ποθεν (mention)
→ Indonesian kuotum (mention)
→ Latin cum (mention)
→ Latin cur (suffix)
→ Latin ubi (mention)
→ Latin quot (mention)
→ Latin quam (mention)
→ Latin uter (mention)
→ Latin quei (inherited)
→ Lithuanian kas (derived)
→ Lithuanian niekas (mention)
→ Dutch wie (inherited)
→ Polish kto (derived)
→ Polish nikt (mention)
→ Polabian kåtü (derived)
→ Old Prussian kas (derived)
→ Russian кой (derived)
→ Sanskrit कश्चित् (derived)
→ Sanskrit कतर (mention)
→ Old Irish cuin (inherited)
→ Serbo-Croatian ко (derived)
→ Serbo-Croatian ko (derived)
→ Serbo-Croatian kdo (inherited)
→ Serbo-Croatian ki (inherited)