Speck

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Old English specca ; compare with the noun speckle.

wiktionary

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From Middle English spekke, from Old English specca(“small spot, stain”). Cognate with Low German spaken(“to spot with wet”).

From earlier specke, spycke (probably reinforced by Dutch spek, German Speck), from Middle English spik, spyk, spike, spich, from Old English spic(“bacon; lard; fat”), from Proto-West Germanic *spik, from Proto-Germanic *spiką(“bacon”). Cognate with Saterland Frisian Späk, Dutch spek, German Speck, Icelandic spik.

etymonline

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speck (n.)

Old English specca "small spot, stain," of unknown origin; probably related to Dutch speckel "speck, speckle," Middle Dutch spekelen "to sprinkle" (compare speckle (v.)). Meaning "tiny bit" developed c. 1400. As a verb, 1570s, from the noun. Related: Specked.