The story
- Portuguese · derived fromcacatua“cockatoo”
- Dutch · borrowed fromkaketielje
- English todaycockatiel
From Dutch kaketielje, possibly a diminutive of kaketoe (“cockatoo”) or derived in Dutch from a diminutive of Portuguese cacatua (“cockatoo”) such as cacatilho or cacatelho. Attested in English since the mid nineteenth century.
Etymology from Wiktionary, CC BY-SA 4.0.