18 pairs of people with the same name and surname in Romance of the Three Kingdoms

A--Cao Jie

1. Great-grandfather of Cao Cao

2. Eunuch, one of the Ten Attendants (there is no such person among the Ten Attendants in historical records)

B--Chen Jiao

1. Important minister of Wei, who along with Hua Xin and Wang Lang requested Emperor Xian of Han to abdicate

2. General under Cao Cao, wounded Zhou Yu while defending Nanyang, later captured by Zhao Yun

C--Chen Qun

1. Important minister of Wei, after Cao Pi's death, he was entrusted with a legacy to assist Cao Rui along with Sima Yi and Cao Zhen

2. Wei general, seen during Sima Yi's campaign against Gongsun Yuan

D--Deng Xian

1. Meng Da's nephew, when Meng Da planned to betray Wei for Shu, he and Li Fu informed Sima Yi

2. General under Liu Zhang, killed in battle against Liu Bei

E--Du Xi

1. Advisor to Cao Cao, once advised Cao Cao to become King of Wei

2. General under Xiahou Yuan

F--Han Hao

1. General under Cao Cao, defeated at Bowangpo with Xiahou Dun

2. Brother of Han Xuan, later beheaded by Huang Zhong

G--Liu Cong

1. Second son of Liu Biao, surrendered to Cao Cao and was subsequently killed

2. Third son of Liu Shan

H--Li Fu

1. Confidant of Meng Da, when Meng Da planned to betray Wei for Shu, he and Deng Xian informed Sima Yi

2. Wei general, participated in Zhong Hui's campaign against Shu

I--Liu Dai

1. General under Cao Cao, captured while attacking Liu Bei with Wang Zhong

2. Governor of Yanzhou, participated in the campaign against Dong Zhuo, brother of Liu Yao

J--Wang Qi

1. Wei general, participated in Deng Ai's campaign against Shu

2. Minister of Eastern Han, killed when Li and Guo attacked Chang'an

K--Xu Yun

1. Minister of Wei, during Sima Yi's coup when Cao Fang went to sacrifice at Gaopingling, Xu Yun was sent to explain to Cao Shuang

2. General of Shuhan, participated in Zhuge Liang's northern campaigns

L--Zhang Hu

1. Wei general, son of Zhang Liao

2. General under Huang Zu, killed by Han Dang

M--Zhang Nan

1. Originally a general under Yuan Xi, surrendered to Cao Cao and was killed by Zhou Tai at Chibi (ranked alongside Jiao Chu)

2. Shuhan general, killed in action during the Battle of Yiling (ranked alongside Feng Xi)

N--Ma Zhong

1. General of Shuhan, participated in Zhuge Liang's northern campaigns, historically an important general in the later period of Shuhan

2. General under Pan Zhang, captured Guan Yu alive, killed by Mi Fang and Fu Shiren during the Battle of Yiling

O--Wang Fu

1. Subordinate of Guan Yu, committed suicide while defending Mai Cheng

2. Eunuch of Eastern Han, conspired with Cao Jie to kill Dou Wu and Chen Fan

P--Zhang Wen

1. Minister of Wu, when Zhuge Liang sent Deng Zhi to mend relations with Wu, Zhang Wen returned the courtesy visit to Shu

2. Minister of Eastern Han, killed by Dong Zhuo

Q--Mu Shun

1. General under Zhang Yang, killed by Lü Bu during the campaign against Dong Zhuo

2. Eunuch of Emperor Xian of Han, conspired with Fu Wan to kill Cao Cao, was killed

R--Li Feng (the only one with three people having the same name and surname)

1. Minister of Wei, plotted secretly to kill Sima Shi, but failed and was killed

2. Minister of Shu, son of Li Yan

3. General under Yuan Shu, killed by Cao's army

Reposted from: "Laughing Proudly in Three Kingdoms"