Feng Ba (Chinese: 馮跋; died 430), courtesy name Wenqi (文起), nickname Qizhifa (乞直伐), formally Emperor Wencheng of (Northern) Yan ((北)燕文成帝), was an emperor (but using the title "Heavenly Prince" (Tian Wang)) of the Chinese state Northern Yan. He became emperor after Gao Yun (Emperor Huiyi), whom he supported in a 407 coup that overthrew Murong Xi of Later Yan, was assassinated in 409. During his reign, Northern Yan largely maintained its territorial integrity but made no headway against the much stronger rival Northern Wei. He was said to have had more than 100 sons, but after his death in 430, his brother and successor Feng Hong (Emperor Zhaocheng) had them all executed.