* Thorfinn:
* Thor: "Thor" as in the god Thor, with a short "o" sound.
* finn: "fin" as in the word "fin," with a long "i" sound.
* Karlsefni:
* Karl: "Carl" as in the name "Carl."
* sefni: "sef-nee" with the "sef" sounding similar to "safe" and the "nee" like the word "knee."
Put it all together: "Thor-fin Karl-sef-nee"
It's a tricky name, but with practice, you'll get it!