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Portuguese word cacatua comes from Malay (macrolanguage) tua, Malay (macrolanguage) kakak, and later Malay (macrolanguage) kakaktua (Cockatoo (a parrot).)
tua (Malay)
Old (of a living being: having lived for relatively many years). Ripe (ready for reaping or gathering, of fruits and seeds).
kakak (Malay)
(rare) brother (older male sibling). (rare) sibling (older person who shares same parents). Sister (older woman or girl having the same parents). Term of address for a female acquaintance who is a bit older.
kakaktua (Malay)
Cockatoo (a parrot).
cacatua (Portuguese)
Cockatoo (a bird).