Don't casually write Manchu's surname and first name together, otherwise it will really make a joke. This is the custom of Manchu people, don't be surprised.
Tong Jia's Manchu is: Tungya?
I'm afraid your name' Yuheng' is difficult to translate into Manchu, and you have to write a long sentence. So it is generally transliteration: iu? Constant? Do it. When writing in Manchu, you can write alone or in combination.
Manchu writing is shown below: