Parents were Niels Olsen and Abelone Andersdatter.
Her father (Niels Olsen) appears on her marriage record as a witness.
Censuses showing Lars Jacobsen and Maren Nielsdatter’s family:
CENSUS 1850 (Store Valby, Ågerup, København S321)
3086 age 29
CENSUS 1860 (Store Valby, Ågerup, København S322)
3087 age 38
CENSUS 1870 (Store Valby, Ågerup, København S323)
3102 age 48
CENSUS 1880 (Store Valby, Ågerup, København S324)
3088 age 58
Family says there may be another daughter in this family, Kirsten Larsen (married to Ole Nielsen). She does not appear in the birth records for Ågerup between 1835-1875, nor does she appear in any of the above census records.