This bird, the Titmouse, is called "sýkora" in Czech.
The surname "Sýkora" is one of the most common ones in the Czech Republic. It is about the 100th most common surname in the Czech Republic, with about 12 000 people having it.
The photos show sýkora modřinka and in one case sýkora koňadra.
Příjmení "Sýkora" patří v Česku mezi ty obvyklejší. Je to zhruba sté nejčastější příjmení v Česku, má ho cca 12 000 lidí. Nejčastěji (podle internetu) na Plzeňsku a Ostravsku (tam ovšem asi kratce - Sykora).
Na fotkách je sýkora modřinka a v jednom případě sýkora koňadra.
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Translated with www.DeepL.com/Translator (free version)
There are a lot of such birds in the city now. Fast and nimble.