Alderney late 300s, at above the island's only natural harbour. The etymology of the island's name is obscure. It is known in Latin as "Riduna" but as with the names of all the Channel Islands in the Roman period there is a degree of confusion. "Riduna" may be the original name of Tatihou, while Alderney is conjectured to be identified with "Sarnia". "Alderney"/"Aurigny" is variously supposed to be a Germanic or Celtic name. It may be a corruption of "Adreni" or "Alrene", which is probably derived from an Old Norse word meaning "island near the coast". Alternatively it may derive from
French immigration to Puerto Rico flow of Peninsular Spanish immigrants from mainland Spain and its own Mediterranean and Atlantic Maritime provinces of Mallorca and the Canary Islands. Today, the great number of Puerto Ricans of French ancestry are evident in the 19% of family surnames on the island that are of French origin. These are easily traceable to mainland France, French Louisiana émigrés, and other French colonies in the Caribbean which experienced catastrophic slave upheavals that forced the French colonists to flee. The descendants of the original French settlers have distinguished themselves as business people, politicians and writers. "La Casa del Francés" (The Frenchman's House),