I went on a walking tour about twenty years ago and the tour guide claimed that Oscar Square and the associated streets was named in honour of Oscar Wilde. However, the reality is that Oscar Square is not named after Oscar Wilde, but rather Oscar, son of Oisín of Na Fianna. Nearby, Clarence Mangan Road was named in honour of the poet, and O’Carolan Road for the harpist.
A friend of mine lived in the area and claimed that there was once a World War II bomb shelter in the small public park but that the park may not have been a public park back then. In December 2020 A local lady told me that when she was young it was known as Rosary Park, and it was always closed to the public except on Sundays, but it is now known as Oscar Square Park even though it is not square [there was also a joke that I cannot include here]. I checked a few maps and it looks square to me but I did come across an account that described it as a triangle.