Password Entropy = length * log2(possible_chars). So this would actually add 7*log2(10) => 23 bits of entropy, assuming the attacker knew that this section was numeric, or ~45 bits if they didn’t.
For anyone curious: Current best practice is a minimum of 100 bits, or 16 characters assuming only letters, numbers, and special characters. The recommended minimum bits increases every year with computing power.
To help with this in the future, you can also create several fake results sharing your real name. Stuff like a blogger with one post not in your writing style, etc… This will dilute searches with disinformation. Removal of real data is important, but you can also confuse anyone looking.