Globally, Гаю (Гаю ) is an extremely rare unknown gender forename. Much more prevalently, Гаю is the last name as well as the forename.
Gaiou, Gaiu, Gaju, Gayu, Haju, and Hayu
Віра, Светлана, Татьяна, Людмила, Василий, Николай, Георгій, Георгий, Михайло, Сніжана, Тетяна, Леонид, Наталя, Дмитро, Галина, Микола, Роман, Ирина, Игорь, Олена, Ганна, Антон, Юрій, Иван, Світлана, and Олександр
) is an extremely rare unknown gender forename. Much more prevalently, Гаю is the last name as well as the forename.