The information I found about Catla/Katla (I used the Katla spelling) is that it's an old Norse name meaning kettle.
The Catla/Katla you mentioned was the daughter of Frideborg, apparently the first known Christian woman in Sweden.
* Ellen * Astrid * Eira * August * Isidore * Emmanuel *
but she wants to be sure 'cause you know sometimes words have two meanings