Where does “de Boer” come from?

de Boer (Dutch) comes from Dutch de, from Middle Dutch die, from Old Dutch thie, from Old Dutch thē, from Proto-Germanic *sa, from Proto-Austronesian *əsa, from Proto-Oceanic *isa.

Ancestry of “de Boer”, step by step

de Boer traces back through two separate lines of ancestry.

via Dutch de

Step	Language	Word	Meaning
1	Dutch	de	the
2	Middle Dutch	die	the; definite article; that, those; who, which,...
3	Old Dutch	thie	that, that one; that
4	Old Dutch	thē	—
5	Proto-Germanic	*sa	—
6	Proto-Austronesian	*əsa	—
7	Proto-Oceanic	*isa	—

via Dutch Boer

Step	Language	Word	Meaning
1	Dutch	Boer	a (male) farmer, peasant
2	Middle Dutch	bure	—
3	Old Dutch	būr	—
4	Proto-West Germanic	*būr	—
5	Proto-Germanic	būraz	room, chamber; dwelling, residence; dweller,...
6	Proto-Indo-European	bʰew-	to grow, swell; to swell, wax, grow; to blow; to...

Words derived from “de Boer”

Deboer

Every word from Proto-Oceanic *isa →Every word from Proto-Austronesian *əsa →Every word from Proto-Germanic *sa →