Where does “Ebur-Bordo” come from?

Ebur-Bordo (Esperanto) comes from Esperanto bordo, from French bord, from Old French bord, from Frankish bord, from Proto-Germanic burdą, from Proto-Indo-European bʰers- — top, tip, point.

Ancestry of “Ebur-Bordo”, step by step

Ebur-Bordo traces back through 3 separate lines of ancestry.

via Esperanto bordo

Step	Language	Word	Meaning
1	Esperanto	bordo	shore; bank; border
2	French	bord	border, edge, limit; boundary
3	Old French	bord	side of a ship, edge; a border
4	Frankish	bord	plank, board; side of a ship or vessel; board,...
5	Proto-Germanic	burdą	board, plank; table
6	Proto-Indo-European	bʰers-	top, tip, point

via Esperanto eburo

Step	Language	Word	Meaning
1	Esperanto	eburo	ivory
2	Latin	ebur	ivory; a thing made of ivory; an elephant
3	Demotic	yb	ivory, Elephantine
4	Egyptian	ꜣbw	cessation; elephant; elephant tusk
5	Egyptian	ꜣb	to stop, to take a break; to cease or stop; to...
6	Proto-Afroasiatic	*leb-	—

via French Côte d'Ivoire

Step	Language	Word	Meaning
1	French	Côte d'Ivoire	—

Every word from Proto-Indo-European bʰers- →Every word from Proto-Germanic burdą →Every word from Frankish bord →