Snot

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late Middle English: probably from Middle Dutch, Middle Low German; related to snout.

wiktionary

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From Middle English snot, snotte, from Old English ġesnot, *snott, from Proto-Germanic *snuttuz(“nasal mucus”), from the same base as snout. Related also to snite.

Cognate with North Frisian snot(“snot”), Saterland Frisian Snotte(“snot”), West Frisian snotte(“snot”), Dutch snot(“snot”), German Low German Snött(“snot”), dialectal German Schnutz(“snot”), Danish snot(“snot”), Norwegian snott(“snot”).

etymonline

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snot (n.)

late 14c., from Old English gesnot "nasal mucus," from Proto-Germanic *snuttan (source also of Old Frisian snotta, Middle Low German and Middle Dutch snotte, Middle Low German snute), from the same base as snout. Old English also had a verb snite "wipe or pick one's nose." Meaning "despicable person" is from 1809.