Catherine I of Russia
Catherine I( born, later known as Marta Samuilovna Skavronskaya; –) was the second wife of Peter the Great and Empress of Russia from 1725 until her death.
Omar Khayyam
Omar Khayyam( 18 May 1048 – 4 December 1131) was a Persian mathematician, astronomer, philosopher, and poet.
He was born in Nishapur, in northeastern Iran, and spent most of his life near the court of the Karakhanid and Seljuq rulers in the period which witnessed the First Crusade.
As a mathematician, he is most notable for his work on the classification and solution of cubic equations, where he provided geometric solutions by the intersection of conics.
Khayyam also contributed to the understanding of the parallel axiom.
As an astronomer, he designed the Jalali calendar, a solar calendar with a very precise 33- year intercalation cycle.
There is a tradition of attributing poetry to Omar Khayyam, written in the form of quatrains(" rubāʿiyāt").
This poetry became widely known to the English- reading world in a translation by Edward FitzGerald(" Rubaiyat of Omar Khayyam", 1859), which enjoyed great success in the Orientalism of the fin de siècle.
Robert Lettis Hooper
Robert Lettis Hooper or Robert Lettice Hooper( died 1738/ 39) was a chief justice of the New Jersey Supreme Court.
Robert McGowan Coventry
Robert McGowan Coventry or Robert McGown Coventry( 1855–1914) was a Scottish painter born in Glasgow.
Robert of Braybrooke
Robert of Braybrooke or Robert le May( 1168 –1210) was a medieval landowner, justice and sheriff.
W. Augustus Barratt
W. Augustus Barratt( 1873- 1947) was a Scottish- born, later American, songwriter and musician.
Robert C. Muehrcke
Robert C. Muehrcke( 4 August 1921, Cincinnati, Ohio – 9 November 2003) was an American physician, known for his description of the clinical sign called Muehrcke's nails.
At the entry of the USA into WW II, he joined the 132nd Infantry Regiment and served with the regiment in Guadalcanal.
In 1945 he was in Okinawa with the 96th Infantry Division.
( In 1982 he published a book," Orchids in the Mud", of personal accounts concerning these wartime campaigns.)
He graduated from the University of Illinois College of Medicine in 1952.
In Chicago he was an associate attending physician at Research and Educational Hospital and Cook County Hospital and an instructor in medicine at the University of Illinois College of Medicine.
In the later years of his career he was in the Department of Medicine of West Suburban Hospital, Oak Park.
He retired in 1992.
He married in 1972.
Upon his death, he was survived by his wife, seven sons, and nine grandchildren.
Robert Fellows
Robert Fellows or Robert M. Fellows( August 23, 1903 in Los Angeles – May 11, 1969 in Los Angeles) was an American film producer who was once a production partner with John Wayne and later with Mickey Spillane.
Ruprecht Haller von Hallerstein
Ruprecht Or Robert Haller von Hallerstein,( 1533- 1560) was a Bavarian noble lord.
Christopher Speer
Sergeant First Class( SFC) Christopher James Speer( September 9, 1973 – August 6, 2002) was a U.S. Army combat medic and an armed member of a special operations team who was fatally wounded during a skirmish in Afghanistan on July 27, 2002.
Speer, who was not wearing a helmet at the time because the mission called for indigenous clothing, suffered a head wound from a grenade and succumbed to his injuries approximately two weeks later.
Omar Khadr was charged and convicted of throwing the grenade that killed Speer.

Question: Who was born later, Omar Khayyam or Robert C. Muehrcke?