Where does “Doppelwohnhaus” come from?

Doppelwohnhaus (German) comes from German doppel-, from German Doppel, from Middle Dutch dubbel, from French doublé, from Middle French double, from Old French doble, from Latin dūplus, from Proto-Italic *duplos — double.

Doppelwohnhaus (German): semi-detached house, duplex (with a firewall and usually sharing a side wall)

Definitions

semi-detached house, duplex (with a firewall and usually sharing a side wall)

Ancestry of “Doppelwohnhaus”, step by step

Step	Language	Word	Meaning
1	German	doppel-	duplicate, double; double
2	German	Doppel	doubles; duplicate
3	Middle Dutch	dubbel	—
4	French	doublé	double, brace, pair; double; doublé
5	Middle French	double	—
6	Old French	doble	double
7	Latin	dūplus	double (twice as much, or as big)
8	Proto-Italic	*duplos	double

Every word from Proto-Italic *duplos →Every word from Latin dūplus →Every word from Old French doble →