Sayn-Wittgenstein [SEP] dissolved or abolished
(centered on Berleburg) and southern (centered on Bad Laasphe) divisions, although the border between the two often shifted. Sayn-Wittgenstein was partitioned in 1607 into: Sayn-Wittgenstein-Berleburg, Sayn-Wittgenstein-Sayn (in the originally territories of Sayn), and Sayn-Wittgenstein-Wittgenstein. The area of both former counties is known today as "Wittgenstein", and is part of the district Siegen-Wittgenstein in the state of North Rhine-Westphalia.
Family today.
Four dynastic branches
Weimar and other German Republics after abolition of the German Empire in 1918 but lawfully retained henceforth as a surname. 
He died as the result of a traffic accident in Hanau on 25 April 1925 at age 42.
Issue.
- Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg, b. 28 Feb 1907, d. 1944 (declared dead in 1969 after being missing in action in Russia, 1944)
- Christian Heinrich, 5th Prince of Sayn-Wittgenstein-Hohenstein, b. 20 Sep 1908, d.