Why did Jabez's mother give him his name?

Answer: She suffered in bearing him

His mother named him Jabez, saying, "Because I bore him in pain" (KJV: "with sorrow"). He was more honorable than his brothers.

“Now Jabez was more honorable than his brothers. His mother had named him Jabez, saying, “Because I bore him in pain.””— 1 Chronicles 4:9 (BSB)