Litlaland farm

I am helping a friend who has a real puzzle in her family history. This is the information she gave me - can anyone help to decipher it? I think the farm Litlaland farm must be in Rogaland as she said it was in the Stavanger area. "About the prince of Denmark--his name MAY have been Fredrik Assverius (Axsverius) de la Roche. He and a norwegian girl, (maybe Marta somebody--who must have been of the Litlaland line) had a baby, Fredrik. The Prince could not marry her, a commoner, but he "gave her a farm" (could that transaction be traced somehow? That may have been in the late 1700's.) This son, Fredrik, married Marta (there's that name again--is the first "Marta" name wront?) Ericksdatter Reke(Rege?). She died in 1878. Their daughter Ingeborg Fredreksdtr Rege (Raegje) married Johannes Olason Litlaland (1806-1870). This Johannes Olson "took over" the Litlaland farm. And this Johannes Olson would be Gustave Leland's grandfather who settled on a farm near Bricelyn, Minnesota. Would it be possible to find out if this same Johannes Olson married twice, marrying the sister of his first wife who died?" This is very confusing and I don't know if I have enough information for you. I have done some research but haven't been able to find even the Litlaland farm. Thanks for any help or suggestions you can give me!