Penguin Puberty

Etymology
The etymology of the word "penguin" is highly disputed. The English word is not apparently of French, nor of Breton or Spanish origin (both attributed to the French word pingouin "auk"), but first appears in English or Dutch.
Some dictionaries suggest a derivation from Welsh pen "head" and gwyn "white", including the Oxford English Dictionary, the American Heritage Dictionary, the Century Dictionary and Merriam-Webster, on the basis that the name was originally applied to the great auk, which had white spots in front of its eyes (although its head was black).