Кронштадт

Etymology
From.

Probably inspired by the name of an older fortification, now known as (see 🇨🇬 or 🇨🇬), before also known as  (from 🇨🇬) (by folk etymology used even in school books, шлот(ъ) has meaning lock, while шлосс(ъ) means key).

Proper noun

 * 1) Kronstadt, a city in Russia