Where does “Sandberg” come from?

Sandberg (Swedish) comes from German sand, from Middle High German sant, from Old High German sant, from Norwegian Nynorsk samd, from Proto-Germanic samdaz, from Proto-Indo-European sámh₂dʰos, from Proto-Indo-European sem- — together, one.

Ancestry of “Sandberg”, step by step

Sandberg traces back through 3 separate lines of ancestry.

via German sand

Step	Language	Word	Meaning
1	German	sand	sand particles of rock
2	Middle High German	sant	—
3	Old High German	sant	sand
4	Norwegian Nynorsk	samd	in agreement
5	Proto-Germanic	samdaz	sand
6	Proto-Indo-European	sámh₂dʰos	sand
7	Proto-Indo-European	sem-	together, one

via Swedish sänd

Step	Language	Word	Meaning
1	Swedish	sänd	sand (finely ground rock)
2	Old Swedish	sander	true, real
3	Old Norse	sannr	true
4	Proto-Germanic	sanþaz	true, real
5	Proto-Indo-European	h₁sónts	active participle of *h₁ésti; being, existence;...
6	Proto-Indo-European	h₁ēs-	to be

via German berg

Step	Language	Word	Meaning
1	German	berg	a mountain, hill
2	Middle High German	bërc	a mountain
3	Old High German	berg	mountain, hill
4	Proto-West Germanic	berg	hill, mountain
5	Proto-Germanic	bergaz	hill; mountain; refuge; shelter
6	Proto-Indo-European	bʰerǵʰ-	to rise; high, lofty; hill, mountain

Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European sámh₂dʰos →Every word from Proto-Germanic samdaz →