Are Olia and Ole sister and brother?

asked were about my great-grandfather JEH and my great-grandmother Olia Pedersdatter Hansen. Thank you for the effort that went into the responses. They were very helpful to me. The question for this post is whether my ggm OPH is the sister of the Norwegian immigrant Ole Pedersen Bakke. The pertinent information is that Olia was born in May, 1850 in Meraker. Her mother was Marit Ingebretsdatter, born on September 3, 1819. Her father was Peder Olsen Bentz. He was born on April 15, 1831. Olia was born out of wedlock. She was baptized at home by Ingebright Johnsen, Nordre Tommeraas. He was not Marit’s father (Olia’s grandfather). Marit’s parents were Ingebright Olsen and Beret Gudmundsdatter. There is apparently no information about the household in which she was raised. There is no indication that Marit and Peder ever married. The 1865 census shows that she was 16 years old and living in the household of Ingebright Johnsen and his family. Neither Marit nor Peder is listed as being a member of this household. Of note, Ole Pedersen Bakke is not member of this household. The 1865 census shows that Peder 35 years old and living in a setting that does not include Marit, Olia, or Ole. Olia left for America in April, 1872. She married JEH in 1877 and they established a successful farm in Pope county, Minnesota. I recently found the ELCA church record of the baptism of their first child, Inga Mathilde. The sponsors l listed int the record were JEH’s mother, brother, sister, and Ole P. Bakke. The ELCA church record of Ole Bakke’s marriage in 1879 lists his birth as October 10, 1854 in Merager, Trondheim. His father is listed as Peder Olsen Bakke. However, multiple ancestry.com family trees list his parents as Peder Olsen Bentz born 1819 and Marit Ingebrightsdatter born 1831. This is independent of Olia, who is not included in the family tree. One of the family trees is petermariniuspeters-3. Are Olia and Ole sister and brother?