Pöyry PLC is now in the hands of institutional investors with net sales of € 620 million, but other parts of the empire are still in the family.

For more dynastical fun you have to look up Ahlström (now officially Ahlstrom), Ehrnrooth, Paulig, Fazer, Hartwall, Strömberg etc. Not too many Finnish names in there ;-).

But look at Finnish joint stock companies of 100 employees or less and you'll find 1000's of Finnish-named family companies. It is not especially tax-beneficial, it simply reflects recent Finnish entrepreneurial  history. 'You run a farm, you can run a company'

You can't be me, I'm taken