Cognomen Вячеслав (Вячеслав 
, Veaceslav 
, Vyacheslav 
, and others...) , globally, is a common last name. The cognomen Вячеслав is habitual in Moldova, where it is quite a common surname, Kyrgyzstan, and Israel (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Russia, Moldova, and Kyrgyzstan. Much more frequently, Вячеслав is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Вячеслав | Kazakhstan, Russia, Belarus, Moldova, Ukraine |
| Veaceslav | Romania, Russia, Moldova, United States, Israel |
| Vyacheslav | Uzbekistan, Russia, Belarus, Moldova, Israel |
| Viacheslav | Uzbekistan, Russia, Kyrgyzstan, Moldova, Israel |
| Vjacheslav | Azerbaijan, Russia, Belarus, United States, Ukraine |
| Wjatscheslaw | Germany, China, United States |
| Viatcheslav | Romania, Russia, Spain, United States, Israel |
| Veacheslav | Moldova, United States |
| Voron | Russia, Spain, Belarus, United States, France |
| Vjačeslav | Croatia, Czechia |
| Vjatšeslav | Estonia |
Anatolevitsj, Molotov, Nikolayevich, Vaclau, Vaclaw, Vasilyevich, Vencel, Venceslao, Venceslav, Ventseslav, Venčeslav, Viaceslav, Viachaslau, Vjacseszlav, Vjatjeslav, Vjatseslav, Vjatsjeslav, Vjačeslavs, Vyachaslau, Vyachaslaw, Václav, Věnceslav, Wacław, Wenzel, Wenzeslaw, Więcesław, В'Ячеслав, Вацлав, Вацлаў, Венцел, Венцель, Венцеслав, Венчеслав, Вячаслав, Вячаслаў, and Слава
Белов, Лебедев, Семенов, Сергеев, Соколов, Сорокин, Сидоров, Смирнов, Тарасов, Романов, Федоров, Кузнецов, Максимов, Михайлов, Медведев, Алексеев, Дмитриев, Николаев, Васильев, Воробьев, Соловьев, Степанов, Захаров, Новиков, Никитин, Поляков, Гусев, Попов, Жуков, Орлов, Козлов, Павлов, Петров, Волков, Зайцев, Иванов, Шевченко, Егоров, Ковалев, Королев, Киселев, Куликов, Кузьмин, Макаров, Морозов, Андреев, Баранов, Борисов, Фролов, and Герасимов