From page 431, Quincy And Adams County, History And Representative Men, David F. Wilcox, published by Lewis Publishing Company, Chicago, Illinois, 1919:

Joseph Freiburg, born May 11, 1840, in Allendorf, Westphalia, married Elizabeth Quinkert. The couple came to Quincy in 1866, where Mr. Freiburg worked in the furniture factory of F. W. Jansen for ten years. In 1876 he in company with his brother, Frederick Freiburg, started a furniture factory, the firm existing until 1892, when Frederick Freiburg sold his interest in the business to Joseph Freiburg, Jr., the firm then being Joseph Freiburg & Sons. In 1895 they discontinued the furniture business, giving their attention entirely to the undertaking business. February 8, 1907, Joseph Freiburg died, and his wife departed this life July 30, 1917. The undertaking business is now conducted by Joseph Freiburg and his brother, Herman Freiburg.

Also, a paragraph from the biography of his son Joseph, in the same book:

His parents were Joseph J. and Elizabeth (Quinkert) Freiburg, both natives of Westphalia, Germany. They came to America and located at Quincy in 1866. The father was a cabinet maker by trade and followed that occupation until July 1, 1876, when with his brother Frederick he engaged in the furniture and undertaking business. In 1892 Joseph J. Freiburg, Jr., bought the interests of his uncle, and the firm was continued as Joseph Freiburg & Son, though about that time they gave up the furniture department and concentrated all their efforts upon undertaking. This name continued until February 8, 1906, when at the death of the father Joseph J. Freiburg bought all the remaining interests in the business. Mrs. Joseph J. Freiburg, Sr., died July 28, 1917. They were the parents of eight children: Joseph J.; Henry J., deceased; Anna, wife of Frank Wachtel, of Quincy; Bernard J., deceased; Herman, associated with his brother in business; Mary, wife of Joseph H. Tushans, of St. Joseph, Missouri; Elizabeth and John, both deceased.