Etymology: Cognate with Old Frisian kōker (West Frisian koker ), Old Dutch cocare (Middle Dutch cōker , Dutch koker ), Middle Low German kȫker , kōker , kāker ( > Old Swedish kogher (Swedish koger ), Old Danish kogher (Danish kogger )), Old High German kohhar , kohhāri (Middle High German kocher , kochære , German Köcher ), all in the sense ‘quiver, case’, ultimately borrowed < an Asian language during the Hunnish invasion of Europe in the late 4th and 5th centuries; compare Uighur kökür , Yakut kögüör , Kazakh kökkör , etc., all in the sense ‘leather bottle or skin’, probably ultimately < a Mongolic language: compare Middle Mongolian køkygyr leather bottle or skin. The Germanic word was apparently also borrowed into Finnish as kukkaro bag, pouch, purse. Compare also post-classical Latin cucurum (8th cent.) and Byzantine Greek κούκουρον (one or other of which > Albanian kukurë ), all in the sense ‘quiver’, ultimately of the same origin, although it is unclear whether the Latin and Greek words were borrowed directly from Hunnish or (perhaps more likely) via Germanic. Compare later quiver n.¹ and discussion at that entry.In sense 2 so called on account of its resemblance in shape and material (originally leather) to a quiver. It has been suggested that earlier currency of this sense may be implied by the surname of Walter Cokerhose (Norfolk; 1301); however, the interpretation of this surname is very uncertain.

Etymology: < cock v.¹ + -er suffix¹.It is unclear whether earlier attestations in surnames reflect this word or cocker n.³ (or even, in examples from coastal areas, a derivative of cock n.² in the sense ‘person who gathers cockles’); compare e.g. Lefwinus Coker (1176), Henry Cokere (1198), Geoffrey Cokkere (1237), Adam le Kockere (1327).

Etymology: < cock v.² + -er suffix¹.Earlier currency is perhaps reflected by surnames; compare examples and discussion at cocker n.²

Etymology: Apparently an alteration (with suffix substitution: see -er suffix¹) of cockle n.⁴

Etymology: < cock n.¹ + -er suffix¹, after cocking n.⁴In sense 2 so called because the dog was originally bred to flush woodcock. With cocker spaniel n. at Compounds compare earlier cocking spaniel n. at cocking n.⁴ Compounds.

Etymology: < the name of Edward Cocker (?1631–76), English arithmetician; Cocker's Arithmetick (apparently taken from his manuscripts) was published posthumously in 1678 by his friend and colleague John Hawkins, and quickly became a standard school textbook.

Etymology: < cock n.¹ (compare sense 14 at that entry) + -er suffix¹. Compare earlier cocky n.¹

Etymology: Probably < cock v.³ (although this is first attested later) or its probable imitative base + -er suffix⁵; compare Norwegian regional kokra and other foreign-language parallels cited at cock v.³ Compare later cockle v.¹Also probably attested early in the obscure compound cokir-nose n. Compare also earlier cokering , of uncertain sense, perhaps ‘clucking’ (a1300 in an isolated attestation: see chokering n.). Attempts to connect the word with cocker v.² (which also has a synonym cockle cockle v.³) are unconvincing.

Etymology: Origin uncertain. Perhaps (i) < cock v.¹ (compare sense 4 at that entry) + -er suffix⁵, with an extension of meaning of the verb from ‘to stick up’ to ‘to stick up in an insecure or unstable way’, or perhaps (ii) an alteration (with suffix substitution: see -er suffix⁵) of cockle v.³ (although this is first attested later). Compare later cockle v.³Apparently unattested between the 16th and early 19th centuries.

Etymology: Probably an alteration (with suffix substitution: see -er suffix⁵) of cockle (inferred < cockling adj.², cockling n.⁴). Perhaps compare earlier cockering adj.¹