Silas Acker of Groveland was the son of Albert Acker. He had a brother Henry. I have quite a bit of information on this family as I thought it was my ancestoral family, but I don't think it is now. I am descended from Alexander Acker. There is an Alexander Acker buried in Groveland, Livingston Co, NY but I haven't been able to find out any dates or relatives to this Alexander.Email me at the address given and I can send you the information I have if you want it.