Where does “Ruggirello” come from?

Ruggirello (English) comes from Italian Ruggirello, from Italian Ruggero, from Old French Rogier, from Latin rogerius, from Frankish Hrōthigeir, from Proto-Germanic Hrōþigaizaz, from Proto-Germanic gaizaz, from Proto-Indo-European ǵʰoysós — winter.

Ancestry of “Ruggirello”, step by step

StepLanguageWordMeaning
1ItalianRuggirello—
2ItalianRuggero—
3Old FrenchRogierfrom Old Frankish
4Latinrogerius—
5FrankishHrōthigeir—
6Proto-GermanicHrōþigaizazfame-spear
7Proto-Germanicgaizazspear, pike, javelin
8Proto-Indo-Europeanǵʰoysósthrowing spear
9Proto-Indo-Europeanǵʰey-winter
Every word from Proto-Indo-European ǵʰey- →Every word from Proto-Indo-European ǵʰoysós →Every word from Proto-Germanic gaizaz →