Name is "Name" in German. "Wie heißt du" is how you'd say What's your name In English: "How called you"
What Koalo Koalo would probably say if he introduced himself in German: "Hallo, ich bin der Koalo-Koalo!"
Der is the way to say "the" for male things. Where my parents grew up, it is more common to say "Ich bin der ___" instead of saying "ich bin ___" But you can also say "Ich heiße ___", it's just slightly more uncommon imo
In English: "How called you"