Liu Bang probably has no name. Liu Bang and his four brothers are irregular brothers and uncles, which is already quite problematic. Liu Bang's father was called Taigong and his mother was called Yu, which are collective names for people of this age group. Not to mention ancient times, there are still many children in rural areas who don't have names. They just call them "cat" and "dog", as long as they have a title.
The name Liu Bang may not have been obtained by Xiao He. At that time, the system of the Han Dynasty was designated by Shusun Tong, so if it was named, it was probably Shusun Tong who came up with it. Or else it’s something that future generations will follow.