Andre, I am doing my husband's TILSTRA line. Unfortunately, I do not have a lot of information before their immigration to the United States. I do know that Peter Tilstra (1847-1924) and his brother, Klaas/Clarence (1853-1922) immigrated to the US between the years 1879-1889. They were born in Morra, Holland. I believe this location is in Friesland. Not sure, yet. Their parents were Jacob Siedzes Tilstra and Siebrigie Pieters "Sadie" Wybolda/Wibalda. They were also born in Morra. Let me know if any names and dates are familiar to you.