May I add two things
1.) The meaning of the word "zsellér" changed throw Centuries. The landless is one of the meanings, but it does not ment everytime and everywhere. I think, the best would be to understand as "poor-peasant", and later to analyse the property-situation of your ancestor.
2,)Be careful with the referred dictionary. I clicked to the link, I got it, then my Avast viruskiller signed: I found here a trojan virus-program and breake the contact.
Lajos
Reich, Hungary.