Wilhelm Conrad Röntgen was born in Lennep, Germany, on March 27, 1845. He was the only child of Friedrich Conrad Röntgen and the former Charlotte Frowein. His father was a textile merchant who came from a long line of metal workers and cloth merchants. His mother had been born in Lennep but then moved with her family to Amsterdam, where they had become wealthy as merchants and traders. When Röntgen was three years old, his family moved to Apeldorn, Holland.