Proto-Indo-European *dʰelgʰ-

→ Bulgarian дълг (root)

→ Czech dluh (root)

→ Old Church Slavonic длъгъ (root)

→ Welsh dylu (root)

→ Welsh dylu (inherited)

→ Lower Sorbian dług (root)

→ Irish dligh (root)

→ Irish dlí (root)

→ Scottish Gaelic dlighe (root)

→ Gothic 𐌳𐌿𐌻𐌲𐍃 (root)

→ Hungarian dolog (root)

→ Macedonian долг (root)

→ Macedonian долг (derived)

→ Polish dług (root)

→ Russian долг (root)

→ Old Irish dliged (root)

→ Old Irish dligid (root)

→ Old Irish dligid (inherited)

→ Serbo-Croatian dug (root)

→ Serbo-Croatian дуг (root)

→ Slovak dlh (root)

→ Slovene dolg (root)