Belarusian пятнаццаць

← Belarusian пяць (compound)

← Belarusian на (compound)

← Belarusian дзесяць (compound)

← Old Church Slavonic пѧть на дєсѧтє (cognate)

← Russian пятна́дцать (mention)

← Ukrainian п'ятна́дцять (mention)