Having a Great Dane, Neapolitan Mastiff, Saint Bernard, or other large dog breed means greater pets, kisses, and cuddles.
Aaron, meaning "strong," in Hebrew, is a suitable name for a large dog, as per Baby Names.
Cleo, a Greek name meaning "glory," is ideal for your large dog, as per Nameberry.
Angus, meaning "one strength," is an Anglicized name, as per Nameberry. It will constantly remind your dog to be strong.
Boris The Slavic name Boris means "battle" and "fight." Your huge dog may be playful and kind, but this bold name suits them.
Maggie Baby Names says Maggie, short for Margaret but also meaning "pearl," is an English name. Your huge, robust dog deserves a strong name.
Ethan The Bible calls Ethan "strong" and "firm," according to Disney Family.