Perhaps you should try some spelling variations:
"Osthoff, William, approximately 1810-1886 Fam" » "Osthoff, William, approximately 1813-1886 Fam", "Osthoff, William, approximately 1840-1886 Fam", "Osthoff, William, approximately 1800-1886 Fam"
"Osthoff, William, approximately 1010-1886 Fam" » "Osthoff, William, approximately 100-1886 Fam", "Osthoff, William, approximately 1740-1886 Fam", "Osthoff, William, approximately 1540-1886 Fam"

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