Batch
late 15th century (in the senses ‘process of baking’, ‘quantity produced at one baking’): based on an Old English word related to bacan (see bake1). Current senses date from the early 18th century.
wiktionary
From Middle English bache, bacche, from Old English *bæċe, *bæċċe(“baking; something baked”), from Proto-Germanic *bakiz(“baking”), related to bacan(“to bake”). Compare German Gebäck, Dutch gebak, baksel.
From Middle English bache, bæcche, from Old English bæċ, beċe(“brook, stream”). Doublet of beck. More at beach.
from an abbreviation of the pronunciation of bachelor(“unmarried adult male”)
etymonline
batch (n.)
late 15c., probably from a survival of an unrecorded Old English *bæcce "something baked" (compare Old English gebæc) from bacan "bake" (see bake (v.)). Generalized sense of "an aggregation of similar articles" is from 1590s. Batch is to bake as watch (n.) is to wake and match (n.2) "one of a pair" is to make. Extended 1713 to "any quantity produced at one operation."
