Trista As A Girls Name Is Of English Origin And Is A Feminine Form Of Tristan Meaning "noisy Or Full Of Sorrows," The Source Was The Name Of A Tragic Male Lover Of Celtic Legend. A Young Knight Sent To Retrieve Isolde, His Kings Betrothed, From Ireland, They Fall In Love But The Romance Ended In Grief. This Ancient Name Might Derive From A Pictish Original, Drostan, But The Form Was Influenced By The French Term "triste," Meaning "sad."