Variant of Massimo/Maximo, from Latin maximus meaning "greatest."
Masimo is a variant of Massimo or Maximo, from Latin maximus meaning greatest. That root gives it an obvious grandeur, one that has helped similar forms remain appealing across Romance-language naming traditions.
Masimo feels bold but approachable, with a smooth, Italianate rhythm. The name suggests excellence and stature without becoming overly formal. It is one of those names whose meaning is direct but still warmly wearable.