Chiefly a record of some of the descendants of Theobald Mechling (Teobald Makeling). He immigrated to America in 1728 with his brother, Jacob. He married Anna Elizabeth Lauer after his arrival the America. She was the daughter of John Peter and Anna Margaret Lauer. They were the parents of eight children.

Theobald (or Dewalt) Mechling/Macklin was born in about 1701. He emigrated from Bavaria, Germany to Pennsylvania in 1728. He married Ann Elizabeth Lauer, daughter of John Peter Lauer and Elizabeth, in Germantown, Pennsylvania. He died in 1765 in Bucks County, Pennsylvania. Theobald and Ann had seven children. Focuses on the descendants of their son, John Peter Mechling (1736-1766). Descendants and relatives lived mainly in Ohio, Michigan, Indiana and Illinois.

The bibliographic holdings of family histories at the Library of Congress. Entries are arranged alphabetically of the works of those involved in Genealogy and also items available through the Library of Congress.

This ten-year supplement lists 10,000 titles acquired by the Library of Congress since 1976--this extraordinary number reflecting the phenomenal growth of interest in genealogy since the publication of Roots. An index of secondary names contains about 8,500 entries, and a geographical index lists family locations when mentioned.