Last name ฤทธิโรจน์ (Matthew 
, ฤทธิโรจน์ 
, Rittiroj ) , in the world, is a widespread surname. The surname ฤทธิโรจน์ is characteristic of Latin America and the Caribbean, particularly Saint Kitts and Nevis, where it is a common surname, Dominica, and Antigua and Barbuda (explore the name in all countries). Measured by absolute frequency, the name is most common in Nigeria, the United States, and Indonesia. More frequently, ฤทธิโรจน์ is the forename as well as the last name.