Can I use names for words that are not in Xinhua Dictionary? For example, ask professionals to answer the word "Meng". Thank you.

A name is a symbol. Of course, you can give it more connotation and make it have deeper meaning. But it is always a sign that distinguishes people. In my opinion, it is not particularly necessary, and uncommon words should be used as little as possible. Many people don't know uncommon words, and they don't exist in the computer font. Although the public security department has specially sorted out the fonts of rare words used in a name, it is still impossible to collect all the rare words, which will be embarrassing when handling documents and handling some business.

I suggest you choose words that are meaningful but not uncommon.