HUMAN NAME · NOT ON THE REGISTRY

Sierra

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. Sierra, as recorded
Sex	Female
2025 rank	616
2025 number	476
Peak year	1998
Peak rank	51
Years present	82 of 146
Dog licences, New York	79
Pet licences, Seattle	12

Statement of record

Sierra was given to 476 girls in 2025, ranking 616th for the year. It peaked in 1998, when it ranked 51st and went to 5,841 babies. It has appeared in 82 of the 146 years on record.

Figure 1. Popularity of a Name: Sierra

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

40%

Basis: phonetics. One sibilant, ends in a vowel. 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.