First Married to Agnes Ballasch and then Maria Ballasch in 1884. Father of Joseph, Theodore, Meri, Mary, Ewald, William Joseph, Irene, Angela, Leopold and Dorothy. Son of Joseph Kundtz and Theresa Kasselbauar. Brother of Emike, Anna, Julia, Theresia and Mary. Born in Unter-Metzenseifen, Hungary (now Slovakia).

Emmigrated to Cleveland Ohio in 1873.

Founder of Theodor Kundtz Company. The company made cabinets for the White Sewing Machine Company. They also made church and school furnature and well as bicycle wheels.

By early 1900, the Theodor Kundtz Company was one of the first "vertically-integrated" businesses in the U.S. and around 1910 which occupied 5 plants in the Cleveland Flats with more than 2,500 workers.

He expanded his company to include the Theodor Kundtz Automobile Bodies that designed and manufactured automobile bodies for many different companies in the early 1900's.

He made it possible for others from Metzenseifen to get started here in Cleveland, Ohio. One of Cleveland's largest employers with more than 2,500 workers. His company held patents for 44 inventions.

He had a stately home located at 13826 Lake Ave in Lakewood, Ohio that resembled a baronial castle. It included a ballroom and a bowling alley. He had every room finished in a different kind of wood. The mansion was torn down in 1961.

Ajacent to the property was a huge lumberyard west of Giel Avenue between Clifton and Detroit owned by his company and later by White Sewing Machines. The lumberyard burned down in 1920.

Theodor helped build the Hungarian Hall in 1890. He was an officer of Forest City Bank and United Banking & Savings. He was president of Detroit St Investment Company and Edgewater Bathing Beach Company. He was a director of the Cleveland Tractor Company. He was a member of the Cleveland Chamber of Commerce and Tippecanoe Club. He attended St. Rose Church.