Jabez's name appears in the genealogy of the line of Judah. In 1 Chronicles 4:9-10, it states that Jabez is more distinguished than his brothers, and that his mother named him Jabez because she had a difficult time during his birth. The name Jabez means "distress." He prayed to God to bless him at his work, and to keep him from evil and disaster, and God granted him his request.
That's all there is in the Bible about the man named Jabez. However, in Chronicles 2:55, Jabez is the name of a city in Judah that is the home of several families of scribes. Its location today is unknown, and whether there is a link between Jabez the man and Jabez the city is unclear at this time.
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