Aldo is an Italian name of Germanic origin, from the element ald, meaning "old" or "noble", and was once a short form of names like Aldobrando. Aldo Moro, the Italian prime minister, and the environmental writer Aldo Leopold are well known bearers, and the name is common in Mexico and Latin America as well. Aldo has been in the US top 1000 every year since 2000, peaked at number 410 in 2002 and ranks number 960 among boys' names in 2025.