Born in the old city centre of Sibiu (German: Hermannstadt) to a Transylvanian Saxon family, Klaus Iohannis is the eldest child of Gustav Heinz and Susanne Johannis. He has a younger sister, Krista Johannis (born 1964). His father worked as a technician at a state-own company, while his mother was a nurse. Both his parents as well as his sister emigrated from their native Sibiu/Hermmanstadt to Würzburg, Bavaria in Germany in 1992, acquiring citizenship there under the right of return granted by the German nationality law, as most other Transylvanian Saxons after the fall of the Iron Curtain. However, he chose to live and work in Romania.