These are my Martin's; 1. Martin Borchardt - Charlotte Spandow married Oct 27, 1734 in Pasewalk 2. Martin Friedrich Borchardt (b May 19 1737 Pasewalk) - Christina Louisa Gericke (b Oct 25 1741 Gartz/Oder) married July 5 1763 in Gartz/Oder 3. Martin Georg Friedrich Borchardt (b July 12 1765 Pasewalk)(d July 10 1844 Altlienenfier) - Friedericke Dorothea Hunow (b Nov 17 1780 Wusterhausen/Dosse)(d Oct 17 1875 Bramstadt) married Dec 28 1798 Lietzenhuttz
That is what I have for Martins these are a direct line, Martin and Friedericke had Ernst Ludwig Borchardt whose children fall into the birth area you are looking for, but no Martins there.