Mongolian дөрөв

← Buryat дүрбэн (cognate)

← Classical Mongolian ᠳᠥ᠋ᠷᠪᠡᠨ (inherited)

← Dongxiang jieron (cognate)

← Kalmyk дөрвн (cognate)

← Proto-Mongolic *dörben (inherited)

← Middle Mongolian ᠳᠥ᠋ᠷᠪᠡ᠋ (inherited)

→ Mogholi دربان (cognate)

→ Mongolian дөрвөл (suffix)

→ Mongolian дөрвөд (suffix)

→ Kalmyk дөрвн (cognate)