HUMAN NAME · NOT ON THE REGISTRY

Cailyn

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. Cailyn, as recorded
Sex	Female
2025 rank	3,728
2025 number	40
Peak year	2009
Peak rank	725
Years present	45 of 146
Dog licences, New York	–
Pet licences, Seattle	–

Statement of record

Cailyn was given to 40 girls in 2025, ranking 3,728th for the year. It peaked in 2009, when it ranked 725th and went to 401 babies. It has appeared in 45 of the 146 years on record. It has fallen 1,254 places since 2020.

Figure 1. Popularity of a Name: Cailyn

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

50%

Basis: phonetics, by spelling. Ends on a consonant. The pronouncing dictionary has no entry, so the letters were sounded out by a stated rule.

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.