Surname วฤทธิ (วฤทธิ , Waritthi ) , all around the world, is an extremely rare cognomen. Much more prevalently, วฤทธิ is the forename as well as the last name.
Wharitthi
นามญ์, วาริชกุลจงเจริญ, and ศรีรัตนพงศ์
, Waritthi