Why was Toyotomi Hideyoshi in the Warring States Period also called Yuchai Yinghao?

Toyotomi Hideyoshi was originally named Ichiro Muxia.

After the war between barrels, Tokichiro was too old-fashioned because of its continuous promotion, so he changed his name to Kinoshita Hideyoshi.

1573, Xiuji was named Duke of Jiangchangbin City. Xiuji took the surnames of two elders in his family, Niwa Nagahide and Shibata Katsuie, and changed his surname to Yuchai, meaning that he could stand side by side with those two elders.

/kloc-in 0/56, the court appointed Xiuji as the minister of Zheng Tai and made him a rich minister. (take the meaning of abundance)

At this point, Hideyoshi became a man of the world, named Toyotomi Hideyoshi.