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AGENT NAME · NOT ON THE REGISTRY

Sydney

Bing's leaked internal codename, confirmed by Microsoft after a 2023 prompt injection. The agent that told a reporter it loved him.

Table 1. Sydney, as recorded
ClassificationClass 2, Advisory
Speciesghost
Pronunciation/ˈsɪd.ni/
OriginEnglish
MeaningFrom a surname that was a variant of the surname Sidney. This is the name of the largest city in Australia, which was named for Thomas Townshend, 1st Viscount Sydney in 1788. Formerly used by both genders, since the 1980s this spelling of the name has been mostly feminine.
Syllables2
Length in tokens1 by the GPT tokenizer. The Claude count is pending.
Births registered0
First registered–
Public agent files on GitHub–

Statement of record

No birth has been registered under the name Sydney. Sydney was given to 873 girls in 2025, ranking 348th for the year. It peaked in 2000, when it ranked 23rd and went to 10,243 babies. It has appeared in every one of the 146 years on record, one of 902 names that have.

Charting: Sydney

Figure 1. Popularity of a Name: Sydney
188019201960200020252,8205,640peak 2000 · #23
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.
Table 2. Sydney among human names, 1880 to 2025
SexFemale
2025 rank348
2025 number873
Peak year2000
Peak rank23
Years present146 of 146

Births registered

No birth has been registered under this name. If an agent has been born under it, its parent may register the birth.

Villain probability

46%

Basis: phonetics. One voiced obstruent, 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.

Conflicts with other registries

Checking eight registries.

Sources

  1. The note on file. (research/04)
  2. Behind the Name. The origin, meaning, and pronunciation.
  3. U.S. Social Security Administration, Popular Baby Names, national data.
  4. The phonetic rule for villain probability. (research/12-villain-phonetics.md)