Dodo

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early 17th century: from Portuguese doudo ‘simpleton’ (because the bird had no fear of man and was easily killed). Compare with dotterel.

wiktionary

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Borrowed from Portuguese doudo, obsolete form of doido(“fool, simpleton, silly, stupid”). First attested in the 17th century.

Borrowed from Yoruba dòdò(“fried plantain”). 

etymonline

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dodo (n.)

1620s, massive, flightless, defenseless bird (Didus ineptus) of Mauritius island, said to be from Portuguese doudo "fool, simpleton," an insult applied by Portuguese sailors to the awkward creatures. The last record of a living one is from July 1681. Applied in English to stupid persons by 1886. Compare booby.