The surname is Han Cheng, the eldest son is Han Chengyin, and the second son doesn't know his name.

It can be named: Han Chengyao (bearing, meaning taking responsibility, continuing, continuing. Yao means the name of an ancient wise king. )

Han Chengxian (a link between the past and the future, taken from "Connecting the Past and the Future", means connecting the past and the future to inspire future generations. )

Han Chenghuan (working hard, especially serving his parents, makes him feel happy. )

Han Chengping (Cheng Ping, describing Taiping. )

For reference.