As a freelancer: contracts.
Full-time employee: letter of confirmation from the company, signed by director/CEO.
Entrepreneur: company ownership or partnership statement.
Greece Digital Nomad Visa scheme allows you to add your family members under your application. The eligible family members are:
The family members of the applicant can also get an individual visa and/or a residence that expires at the same time as the digital nomad visa. In this case, the required amount of minimum income is bigger - by 20% for the spouse and by 15% for each child. The family members are also not allowed to have any kind of dependent work or professional activity in Greece.
If you want to renew the residence permit, you should not be absent from the country more than 6 months per year.