C-BO

From Discogs:

C-Bo, born Shawn "Cowboy" Thomas in 1971 in the Garden Block area of Sacramento, California, has sold over 2 million albums independently since 1993. In late 2006/early 2007, C-Bo signed a record deal with Nashville, Tennesse-rapper and former G-Unit-member Young Buck and his record label, Ca$hville Records.

From Lastfm:

C-Bo, born Shawn "Cowboy" Thomas on 1971 in the Garden Block area of Sacramento, CA, is known for his often controversial and explicitly violent lyrics, in 1997, for example, he was actually put in jail because of things he said on his album "Til' My Casket Drop". Apart from his extensive work as a solo artist he has also worked with a wide variety of known bay-area and cali rappers such as Tupac Shakur, E-40, Yukmouth, Spice 1, Dru Down, Kokane, Daz Dillinger and Brotha Lynch Hung. C-Bo is also part of the bay-area super group Thug Lordz, along with frequent collaborators Spice 1 and Yukmouth.

From Wikipedia:

Shawn Thomas, better known by his stage name C-Bo (abbr. for Cowboy) is an American rapper. He was born and raised in the Garden Blocc of Sacramento, California. He has sold over 3.5 million albums independently since 1993. He is currently signed to Cashville Records.