@Yatin No, that name shouldn't be blacklisted. Apart from it being a common real name, there are currently at least 3 users across SE with that username with reasonable contributions. The 11|0|3 result is only for posts recorded in MS. You can use this
SEDE query by Glorfindel to find all users with a username. It won't do a regex search, and it's case-insensitive, but it works well for this purpose.