Where does “Twardziak” come from?

Twardziak (Polish) comes from Polish Twardy, from Polish twardy, from Proto-Slavic tvьrdъ, from Proto-Balto-Slavic *twírˀtas, from Proto-Indo-European twerH- — to enclose, fence in; to grab, seize; to stir.

Ancestry of “Twardziak”, step by step

StepLanguageWordMeaning
1PolishTwardyhard
2Polishtwardyhard; tough; firm
3Proto-Slavictvьrdъhard, firm, solid
4Proto-Balto-Slavic*twírˀtashard, firm, solid
5Proto-Indo-EuropeantwerH-to enclose, fence in; to grab, seize; to stir
Every word from Proto-Indo-European twerH- →Every word from Proto-Balto-Slavic *twírˀtas →Every word from Proto-Slavic tvьrdъ →