Sven Olsson and Ellna Olsdotter

I'm looking for more info on Sven Olsson and Ellna Olsdotter. Sven and Ellna were living in Riseberga, Kristianstad län, Skåne in 1806, when their son, Nils Svensson, was born. Nils' was born on Feb or Jun 4, 1806, and he married Hanna Torstensdotter on Jul 8, 1829 at Röstånga, Malmöhus län, Skåne.

I'd like to know when and where Sven and Ellna were born, and if they had other children.

Thank you.

Diane