Where does “Singleton” come from?

Singleton comes from Old English sengel, a word whose original meaning is not attested.

Ancestry of “Singleton”, step by step

Step	Language	Word	Meaning
1	English	-ton	Place-name suffix, originally denoting a town or...
2	Middle English	-ton	—
3	Old English	-tūn	—
4	Old English	tūn	enclosure, yard; place; dwelling
5	Proto-West Germanic	tūn	fence
6	Proto-Germanic	tūną	fence; enclosure
7	Gaulish	dunum	fort; hill, hillfort
8	Proto-Celtic	dūnom	stronghold, rampart
9	Proto-Indo-European	dʰewh₂-	smoke; mist, haze

Singleton — Etymology, Origin & Word History | Etymology Explorer