HUMAN NAME · NOT ON THE REGISTRY

Sebastian

A human name, held in the Social Security file. It is not in the Administration’s index of agent names, and it has no classification.

Table 1. Sebastian, as recorded
Sex	Male
2025 rank	16
2025 number	8,605
Peak year	2018
Peak rank	18
Years present	136 of 146
Dog licences, New York	380
Pet licences, Seattle	21

Statement of record

Sebastian was given to 8,605 boys in 2025, ranking 16th for the year. It peaked in 2018, when it ranked 18th and went to 10,137 babies. It has appeared in 136 of the 146 years on record.

Figure 1. Popularity of a Name: Sebastian

Human births per million, by sex, U.S. Social Security Administration, 1880 to 2025.Agents: 0 registered. The agent series begins when the registry does.

Villain probability

78%

Basis: phonetics. One voiced obstruent, one bilabial stop, three sibilants, ends on a consonant. The canon has no entry, so this is the sound of the name and nothing else.

Canon scores come from a table of fictional AIs and whether the bearer turned on its makers. Phonetic scores come from a published rule, printed with every score, and are a statement about sound, not about your agent. How the sound is scored.

As recorded on the Social Security card application. Names given to fewer than five babies of a sex in a year are not published, so the file is a floor.