康熙字典

Variant of 賢

It looks like an error form of U+8D12 贒, with 忠 written cursively like 虫. The evidence from 康熙字典 shown by Tao Yang only shows 贒. Suggest not encoding without better evidence.

The name of a living person is the different issue with ancient character.

I very much think that the character with 虫 bug (!) must be a mistaken form of U+8D12 贒, which is most likely to be the character the living person actually uses. Can you please show the original handwritten evidence provided by the living person who uses this character so that we can see if they really do want to be a 'bug' 虫 or 'loyal' 忠.