Where does “Steffensen” come from?

Steffensen (Danish) comes from Danish Steffen, from Danish Stefan, from Latin Stephanus, from Ancient Greek Στέφανος, from Ancient Greek στέφω, from Proto-Hellenic stékʷʰō, from Proto-Indo-European stegʷʰ- — to enlace.

Ancestry of “Steffensen”, step by step

Step	Language	Word	Meaning
1	Danish	Steffen	—
2	Danish	Stefan	—
3	Latin	Stephanus	—
4	Ancient Greek	Στέφανος	In particular: Stephen, an early Christian martyr
5	Ancient Greek	στέφω	I put around; I encircle, crown, wreath, garland
6	Proto-Hellenic	stékʷʰō	to enlace, crown, encircle
7	Proto-Indo-European	stegʷʰ-	to enlace

Every word from Proto-Indo-European stegʷʰ- →Every word from Proto-Hellenic stékʷʰō →Every word from Ancient Greek στέφω →