I am related by marriage to George Martin, grandson of Nikolaus & Philipine (nee Bucher) Martin. I have a Martin family tree paper, and does not mention daughter Philipine. It mentions Peter B.1847, Martin B.1849, and Maria B.1852. It says they came to America in 1856.
If you have Ancestry.com, I have them all in my "WITTE" family tree. If not I can send you an invite to view it for free.I will look further in to this.