The name Allah is unique. It has no feminine or masculine form (unlike god or goddess). It also has no plural form (unlike gods and goddesses). Allah simply means "The One and Only True God."
The name Allah was not a name invented by the Arabs. In the Torah, we find God gave Himself the name "Elah", or in some cases, "Eloh". It was also used in the Aramaic language spoken by Jesus.
Editor Note: For the sake of simplicity, we have used the word God on this website, in place of Allah.