Jockon.

1625 A. Battel Angola in S. Purchas Hakluytus Posthumus II. vii. iii. 982 The greatest of these two Monsters is called, Pongo in their language: and the lesser is called, Engeco.

1766 G. Buffon Hist. Nat. (1837) III. 590 Jocko, Enjocko, nom de cet animal a Congo, et que nous avons adopté. En est l'article que nous avons retranché.]

1777 P. Thicknesse Year's Journey France & Spain II. xl. 68 My monkey..rode postilion upon my sturdy horse... Jocko put whole towns in motion.

1778 P. Thicknesse Year's Journey France & Spain (ed. 2) II. xlv. 106 I have seen an animal of the Jocko kind, when chained to a spot, contrive to get his food, which was out of his reach, by an address which many human creatures would have perished for want of abilities to put in practice.

1847 Savage in Boston Jrnl. Nat. Hist. V. 422 Their local name for the Chimpanzee is Enche-eko, as near as it can be anglicised, from which the common term Jocko probably comes.

1861 P. B. Du Chaillu Explor. Equatorial Afr. xx. 359 In the Gaboon country the Chimpanzee is called Nshiego, in the interior it is known as the Ncheko.

1861 P. B. Du Chaillu Explor. Equatorial Afr. xx. 362 The Chimpanzee is called Engeco by Battel, 1625;..Enjocko, Jocko, by Buffon, 1766; Inchego, by Bowdich, 1819; Enche-eco, by Savage, in 1847; Ntchego, by Franquet, in 1852; Nchego, by Aubry Lecomte, 1854–57; most of which are variations again of the Camma name, which, according to our English mode of spelling, should be, as I have given it, Nshiego..the negro name for the true Chimpanzee.]

1863 T. H. Huxley Evid. Man's Place Nature i. 14 Thus it was that Andrew Battell's ‘Engeco’ became metamorphosed into ‘Jocko’, and, in the latter shape, was spread all over the world, in consequence of the extensive popularity of Buffon's works.