Jarno Widar is a pretty interesting name
Jarno is a specifically Finnish form of Jeremy. I can't find any info on how he ended up with a specifically Finnish name but I'm going to assume it's due to Italian F1 driver Jarno Trulli, who in turn got it from Finnish F1 driver Jarno Saarinen. Maybe there's something out there confirming or refuting this but most articles on Widar are paywalled so we will never know
As for his last name, it could be the Dutch form of Víðarr, a Norse god, son of Óðinn. I mean, it's not actually that (it probably comes from the completely mundane personal name *Widuharduz, "wood-hard/strong/brave", equivalent to a hypothetical Modern Dutch Wedehard), but it could be
All in all, 10/10 I'd say
Jarne/Yarne/Bjarne/Jarno are all pretty common names in Belgium. Whilst I never met a "Jarne or Bjarne" over 30 years old I've met some Jarno's who are in their fifties.
They do come from Finnish and/or Danish but nobody here bats an eye when you're called that.
FE: If I type in "Bjarne" on the PCS searchbar I get more Belgian hits than Scandinavians.
His surname on the other hand is mainly found in Wallonia and origins are tricky, with names like these more than likely it was a given name and everyone named Widar is a decendant from that one person, He would've been a prominent elder figure and/or political leader somewhere around the Liège region.
Belgian surnames are tricky, surnames tend to have more historical meaning than Dutch ones due to when they were officialy recorded and the role Napoleon played in it (The Dutch didn't really fancy his rule and often gave ridiculous names such as 'Bol', 'Boom', 'Sip', 'Pies', 'Hol', "Zak" etc. when he implemented surnames when the Netherlands were under his rule)
Each year my students need to write a dissertation on their surname and each year there is a dude called something along the lines of "Widar", "Gaeremynck" or "Tibergyn" where the answer is probably the one written above here.
Or, he has Slovenian/Croatian ancenstry, since Widar apparently is a surname there aswell meaning bricklayer/mason.