Question: The Celtic Princess fell for The Prince of Rheged who was ruler of what modern day country? 

Context paragraphs:
Phocaea: Phocaea, or Phokaia (Greek: Φώκαια ; modern-day Foça in Turkey) was an ancient Ionian Greek city on the western coast of Anatolia.  Greek colonists from Phocaea founded the colony of Massalia (modern day Marseille, in France) in 600 BC, Emporion (modern day Empúries, in Catalonia, Spain) in 575 BC and Elea (modern day Velia, in Campania, Italy) in 540 BC.

Black Peril: The Black Peril refers to the fear of colonial settlers that black men are attracted to white women and are having sexual relations with them.  This goes back to class and race prejudices.  Examples can be seen in British colonialism of India and Africa.One of the major areas that has been written and documented in having experienced the Black Peril is South Africa,or more specifically in certain writings, Southern Rhodesia, which later became the modern day country Zimbabwe in 1980.  Black Peril is a colonial based fear that started in Southern Rhodesia and survived all the way to the independence of Zimbabwe.

Mithridates I of the Bosporus: Mithridates I of the Bosporus sometimes known as Mithridates II of the Bosporan and Mithridates of Pergamon (flourished 1st century BC), was a nobleman from Anatolia.  Mithridates was one of the sons born to King Mithridates VI of Pontus from his mistress, the Galatian Celtic Princess Adobogiona the Elder.  He also had a full blooded sister called Adobogiona the Younger.  The Pontic Prince was of Persian, Macedonian and Celtic ancestry.

Governorate of Paraguay: The Governorate of Paraguay (Spanish: "Gobernación del Paraguay" ), originally called the Governorate of Guayrá, was a governorate of the Spanish Empire and part of the Viceroyalty of Peru.  Its seat was the city of Asunción; its territory roughly encompassed the modern day country of Paraguay.  The Governorate was created in December 16, 1617 by the royal decree of King Philip III as a split of the Governorate of the Río de la Plata and of Paraguay into its respective halves.  The Governorate lasted until 1782, after which the massive Viceroyalty of Peru was split, and Paraguay became an intendency ("intendencia") of the new Viceroyalty of the Río de la Plata.

Modern Day Zero: Modern Day Zero is a hard rock band based in St. Louis, Missouri.  Formerly called Mesh—changed to Mesh STL after the name-conflict with Mesh—the band renamed and restarted as Modern Day Zero.  Their single, "Sick Inside," from their first album, "Coming Up for Air", spent eight weeks as the most-requested song on St. Louis-area alternative rock radio station KPNT.  Modern Day Zero has had songs included in the video games "NHL 2004" and "NASCAR Thunder 2004" and has toured with bands such as Puddle of Mudd, Nickelback, Velvet Revolver, Hoobastank, and Guns N' Roses.

Credo (novel): Credo is a novel by British author and broadcaster Melvyn Bragg, published in 1996.  An epic story of the Christian faith set in 7th Century Britain, it centres on the life of a young Celtic Princess torn between her dedication to God's service and her love for Padric, a Prince of Rheged.  Set against the background of venerated Church figures of the period notably St Cuthbert, St Wilfrid and Hilda of Whitby, Bega (i.e. St Bee) experiences all the violence and deprivations of her age.

Tootsie's Orchid Lounge: Tootsie's Orchid Lounge (also known as Tootsie's World Famous Orchid Lounge) is a honky-tonk bar located in Nashville, Tennessee behind the Ryman Auditorium.  Tootsie's has three stages that host live local talent each night; covering modern day country music artist such as Jason Aldean, Taylor Swift, and other popular country music artists as well as original work.  Some of its early famous first customers were Willie Nelson, Patsy Cline, Mel Tillis, Kris Kristofferson, Waylon Jennings, Roger Miller and numerous others country musicians.  According to www.tootsies.net, Willie Nelson received his first songwriting gig after singing at Tootsie's.  Terri Clark a Canadian-born country artist started singing at Tootsie's in 1987.  and has since become an internationally known country superstar with hits such as Better Things to Do, and the Warren Zevon cover, Poor Poor Pitiful Me.

Rheged: Rheged (] ) was one of the kingdoms of the "Hen Ogledd" ("Old North"), the Brittonic-speaking region of what is now Northern England and southern Scotland, during the post-Roman era and Early Middle Ages.  It is recorded in several poetic and bardic sources, although its borders are not described in any of them.  Some modern scholars have suggested that it included what is now Cumbria in North West England and possibly extended into Lancashire and Scotland.  In some sources, Rheged is intimately associated with the king Urien Rheged and his family.  Its inhabitants spoke Cumbric, a Brittonic dialect closely related to Old Welsh.

Adobogiona: Adobogiona (fl.  c. 80 BC - c. 50 BC) was a Celtic princess from Anatolia.  She was the daughter of king Deiotarus of Galatia and Berenice, Princess of Pergamon, probably a daughter of king Attalus III of Pergamon.

Saint Grwst: Grwst was the son of Gwaith Hengaer ap Elffin, a Prince of Rheged, thought to be centred on modern day Cumbria, and Euronwy ferch Clydno Eiddin, a Princess of "Din Eiddin" (Edinburgh) in Lothian, making him the great-grandson of King Urien Rheged.

Supporting paragraphs: Credo (novel) Rheged
Answer: Northern England