Where does “Ericson” come from?

Ericson (English) comes from English Eric, from Middle English Eric, from Old English Eoric, from Old Norse Eirríkr, from Old Norse ríkr, from Proto-Germanic rīkijaz, from Proto-Germanic rīks, from Proto-Celtic rīxs — to straighten, to right oneself; right; just.

Ancestry of “Ericson”, step by step

Ericson traces back through two separate lines of ancestry.

via English Eric

StepLanguageWordMeaning
1EnglishEricA fine paid as compensation for violent crimes
2Middle EnglishEric
3Old EnglishEoric
4Old NorseEirríkr
5Old Norseríkrrich
6Proto-Germanicrīkijazkingly, royal, noble; mighty, powerful; rich
7Proto-Germanicrīksking, ruler
8Proto-Celticrīxsking
9Proto-Indo-Europeanh₃rḗǵsking, ruler
10Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via English Sơn

StepLanguageWordMeaning
1EnglishSơn
2Middle Englishsoneson; soon; Alternative form of sonne
3Old Englishsōnaimmediately, at once
4Proto-West Germanicsān(ō)immediately
5Proto-Germanicsēna
6Proto-Germanic*sa
7Proto-Austronesian*əsa
8Proto-Oceanic*isa
Every word from Proto-Indo-European h₃reǵ-