Christina Dorothea Juncken was born in Germany on 6 September 1699. She married needlemaker Johann Ernst Juncken and they lived together in Durlach, Germany. They had three children: Johann Heinrich (later Henry), Christina Dorothea, and Christina Barbara. Christina Dorothea and her family migrated to the United States in approximately 1753, where they settled in Philadelphia. She died in 1782.

Alfred John Jukes-Browne was born on April 16, 1851, in Penn, Staffordshire, England.
He was a British paleontologist, stratigrapher, and geological surveyor. He was educated at Highgate School (1863–1868) and at St. John's College, Cambridge (B.A., 1874). In 1874, he became an assistant at the Geological Survey of Great Britain and was chiefly occupied in mapping parts of Suffolk, Cambridge, Rutland, and Lincoln up to 1883 and then entrusted with the preparation of a monograph on the British Upper Cretaceous rocks. He became a Fellow of the Geological Society in 1874 and won its Murchison medal in 1901. In 1909, he was elected a Fellow of the Royal Society. He contributed numerous papers to geological periodicals and wrote several books, e.g., “The Student's Handbook of Historical Geology" (1886) and "Building of the British Isles” (1911). He retired from the Geological Survey in 1902 on account of ill-health.
In 1881, he married Emma Jessie Smith (1858–1892). He died on August 14, 1914, in Newton Abbot, Devon, England.

John Wesley Judd was born on February 18. 1940, in Portsea Island, Hampshire, England.

He was a British geologist. He was educated at the Royal School of Mines and worked for the Geological Survey of England and Wales (1867-1870). In 1871, he was on the Board of Education and worked as Inspector of Schools. In 1876, he became Professor of Geology at the Royal School of Mines (1876-1905). He was elected a Fellow of the Royal Society in 1877. He was President of the Geological Society (1886-1888) and was awarded their Wollaston Medal in 1891. He was later Dean of the Royal College of Science in London (1895-1905). In 1913, he became Emeritus Professor of Geology at Imperial College. He wrote several books, e.g., "The Geology of Rutland, and the Parts of Lincoln, Leicester, Northampton, Huntingdon and Cambridge" (1875), "Volcanoes: What They Are and What They teach" (1881), "The Eruption of Krakatoa, and Subsequent Phenomena" (1888), and "The Coming of Evolution" (1910).

In 1878, he married Jeanne Frances Jeyes (1849–1942). He died on March 3, 1916, in Richmond, Surrey, England.

Judah was curator of McGill's museums from 1925-1931. Previous to this, he worked as a museum technician under Maude Abbott.