Old Norse flatr

← Proto-Germanic *flataz (inherited)

← Proto-Indo-European *pleth₂- (root)

→ English flat (derived)

→ Danish flad (derived)

→ French flatter (cognate)

→ Irish lann (cognate)

→ Scottish Gaelic lann (mention)

→ Norwegian Bokmål flat (derived)

→ Norwegian Nynorsk flat (derived)

→ Old Norse flet (mention)

→ Old Irish lann (cognate)

→ Swedish flat (derived)