'Armor bearer' in the Bible

Then said Saul to his armorbearer, Draw your sword, and thrust me through with it; lest these uncircumcised come and abuse me. But his armorbearer would not; for he was greatly afraid. So Saul took a sword, and fell upon it.

And when his armorbearer saw that Saul was dead, he fell likewise on his sword, and died.

Zelek the Ammonite, Naharai the Beerothite, the armorbearer of Joab the son of Zeruiah,