man‎Constantine I Oldenburg‏‎, son of William George I of the Hellenes Oldenburg and Olga Constantinovna‏.
Born ‎2 Aug 1868 Athens,Greece, died ‎11 Jan 1923 Palermo,Italy‎, age 54 years, buried ‎Nov 1936 Tatoi,Near Athens,Greece

Married ‎27 Oct 1889 Athens,Greece, age 21 years (married 33 years) to:

womanSophie of Prussia‏, age by marriage 19 years, daughter of Frederick III and Victoria Adelaide Mary‏.
Born ‎14 Jun 1870 Potsdam,Germany, died ‎13 Jan 1932 Frankfurt,Germany‎, age 61 years, buried ‎Nov 1936 Tatoi,Near Athens,Greece
Children:
1.
manGeorge II Oldenburg‏
Born ‎19 Jul 1890 Tatoi,Near Athens,Greece, died ‎1 Apr 1947 Athens,Greece‎, age 56 years, buried Tatoi,Near Athens,Greece

2.
manAlexander I Oldenburg‏
Born ‎1 Aug 1893 Tatoi, died ‎25 Oct 1920 Athens,Greece‎, age 27 years, buried Tatoi

3.
womanHelen of Greece‏
Born ‎2 May 1896 Athens,Greece, died ‎28 Nov 1982 Lausanne,Switzerland‎, age 86 years

4.
manPaul I Oldenburg‏
Born ‎14 Dec 1901 Athens,Greece, died ‎6 Mar 1964 Tatoi,Near Athens,Greece‎, age 62 years, buried Tatoi,Near Athens,Greece

5.
man‎Child 5‏‎

6.
man‎Child 6‏‎
Born ‎1913‎, age 110 or 111 years