Gecko

google

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late 18th century: from Malay dialect geko, gekok, imitative of its cry.

wiktionary

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The modern form was probably borrowed into English and other European languages from Dutch gekko (1718). Contemporary English forms were chacco (1711) and jackoa (1724). The further origin is not quite clear. Some sources mention a supposed Malay gekok, gekoq, or gekop, which would be imitative of the gecko’s chirping sound. Another theory derives it from Acehnese gèh-gòh(“busy”).

gecko

etymonline

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gecko (n.)

1774, from Malay (Austronesian) gekoq, said to be imitative of its cry. Earlier forms in English were chacco (1711), jackoa (1727).