https://www.ssb.no/befolkning/navn/statistikk/navn says there are 12 people in Norway with that name.

Here's a footballer from Tromsø with that name: https://www.til.no/nyheter/mads-med-forste-proffkontrakt . He is 17 years old, so not the 21 year old mentioned here.

Here is another Mads Mikkelsen in Tromsø. https://fjellet.dk/