No, Guan Ping was gifted from his actual father, to Guan Yu, as they had the same surname, and he wanted to give one of his sons to Guan Yu. Guan Ping was the one who could fight, and his brother was smart. So Guan Yu took Guan Ping as his son.
Three: Guan Ping, Guan Xing, Guan Suo
Guan Ping is the full name of a general belongs to the kingdom Shu during the Three Kingdoms period. He is the son of Guan Yu. In the novel, he does not have blood tie with Guan Yu but still faithful to his nominal father, standby him and died in one place.
Jo-ping c has written: 'Yu guan yin'
Guan Xiu died in 912.
Guan Daosheng died in 1319.
Guan Bo died in 797.
Guan Lu died in 256.
Guan Tianpei died in 1841.
Qin Guan died in 1100.
Guan Pinghu died in 1967.
Tong Guan died in 1126.