'Armourbearer' in the Bible

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

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

Zelek the Ammonite, Naharai the Berothite, the armourbearer of Joab the son of Zeruiah,