Plato Admetus Electra Demeter: NAME STYLE

You may want to visit this blog post which explains the system in detail.
Or just read this short guide:

Sound and Style

Elaborate – names with three or more syllables and ending in a vowel sound.

Substantial – names with three or more syllables and ending in a consonant sound.

Tailored – names with one or two syllables and ending in a consonant sound.

Light – names with one or two syllables and ending in a vowel sound.

Past Popularity

Antique – names that peaked in the 1880s and the 1910s.

Vintage – names that peaked in the 1920s to 1960s

Retro – names that peaked in the 1970s to the 1990s.

Modern – names that peaked or have started peaking after 2000.

Quirky – names that have never entered the US popularity charts.

Current Popularity

Popular – names above 150 in the current UK popularity chart.

Fashionable – names between 150 and 450 in the current UK popularity chart.

Familiar – names below 450 in the UK popularity chart.

Unusual – names not currently in the top 1000 names in the UK.