I was just curious so I looked a little. According to several websites:
El Kalah means "the fortress"
I wonder how AAOMS temples get their names. I know the history of Shriners in Utah goes back like 125 years. Unfortunately there isn't a lot of history on-line for the El Kalah Temple. Its too bad, even the listed website is 3 years out of date. This will be something I will look into further at some point.