Quick answer
Elmo is a boy name meaning "helmet, protection".
Pronunciation: Italian /ˈel.mo/; English /ˈɛl.moʊ/.
Meaning and history
Originally a short form of names ending with the Old German element helm meaning "helmet, protection", such as Guglielmo or Anselmo. It is also a derivative of Erasmus, via the old Italian short form Ermo. Saint Elmo, also known as Saint Erasmus, was a 4th-century martyr who is the patron of sailors. Saint Elmo's fire is said to be a sign of his protection. In the English-speaking world this name is now associated with a red muppet character from the children's television program Sesame Street.
Notes and context
Usage: italian, english, finnish, estonian