This family came on the ship Franklin in 1862 with father, Anders and mother, Maren, and children: Jens, Jensine, and Lauritz. She is known as Jensinah on the roster.
According to Family Search, she was the daughter of Niels Pinstrup. He died in 1853. Maren married Anders in 1854. Jensine took on her stepfather's surname after that point.