I really like the name
Astrid (even though, yes, it does sound very close to asteroid!). I don't really care for the name
Frida. I like
Annika but wouldn't pair it with
Astrid because the combo sounds too close to that health insurance company (or drug company)
Astra Zeneca (you know which one I mean? The commercial says, "If you're not able to afford your medication
Astra Zeneca may be able to help.") I like the name
Sven but don't really care for
Olof! I do like your naming style though!