According to Hebrews 7, what does the name Melchizedek mean?

Answer: King of righteousness

Hebrews 7:2 says Melchizedek's name means "king of righteousness," and his title "king of Salem" means "king of peace."

“This Melchizedek was king of Salem and priest of God Most High. He met Abraham returning from the slaughter of the kings and blessed him, and Abraham apportioned to him a tenth of everything. First, his name means “king of righteousness.” Then also, “king of Salem” means “king of peace.””— Hebrews 7:1-2 (BSB)