This may seem like a "fast one" for native English speaking participants in ABC Wednesday. It isn't. I have chosen this letter Å = Aa to stand for the fact that many Roman alphabets consist of more than 26 letters. In our case it is 29. The others are Æ=Ae and Ø=Oe. However - Å=Aa will do for now: Wikipedia explains it like this:
The letter Å represents various ò sounds in the Swedish, Finnish, Danish, Norwegian, North Frisian, Walloon, Chamorro, and Istro-Romanian language alphabets. Other alphabets using the letter include the Lule Sami, Skolt Sami, and Southern Sami alphabet.Furthermore:
Å is often perceived as an A with a ring, interpreting the ring as a diacritical mark. However, in the languages that use it, the ring is not considered a diacritic but part of the letter. It developed as a form of semi-ligature of an A with another smaller a above it to denote a long a, similar to how the umlaut mark ¨ is developed from a small e written above the letter in question.
In an attempt to modernize the orthography, linguists tried to introduce the Å to Danish and Norwegian writing in the 19th century. Most people felt no need for the new letter, although the letter group Aa had already been pronounced like Å for centuries all over Scandinavia. Aa was usually treated as a single letter, spoken like the present Å when spelling out names or words. Orthography reforms making Å official were carried out in Norway in 1917 and in Denmark in 1948. It has been argued that the Å only made its way to official Danish spelling due to anti-German and pro-Scandinavian sentiment after World War II. Danish had been the only language apart from German to use capitalized nouns, but abolished them at the same occasion. In a few names of cities or towns, the old spelling has been retained, e.g. Aalborg.In our language (Norwegian) it has many uses, among them as infinitive marker corresponding to the English to. It is also, as in this case, a name (often meaning "little river"). The road sign shown here is from Å in the municipality of Moskenes in Lofoten in the county of Nordland in Norway. There are however, several places in Scandinavia bearing this name.