Waldrada of Lotharingia
Waldrada was the mistress, and later the wife, of Lothair II of Lotharingia.
Agatha (wife of Samuel of Bulgaria)
Agatha was the wife of Emperor Samuel of Bulgaria.
Eunoë (wife of Bogudes)
Eunoë was the wife of Bogudes, King of Mauretania.
Nabeshima Naooki
Naooki received the title of Kai no Kami in 1750.
Kaari Utrio
Kaari Marjatta Utrio (born 28 July 1942, official surname Utrio-Linnilä) is a Finnish writer.
She has written over 35 historical novels and 13 non-fiction books on historical topics.
She is a historian, holding the degree of Master of Arts from the University of Helsinki, and has returned from the position of Professor in service of the Finnish State Commission of Fine Arts.
Kai Linnilä
Kai Linnilä (1942 - 24 August 2017) was a Finnish editor and the writer of many non-fiction books as well as the husband of the novelist Kaari Utrio.
He was also responsible for the importation and marketing of cigars and pipes in the Oy Amanita Ltd, owned by the Utrios family.
Artaynte
Artaynte( f. 478 BC), was the wife of the Crown Prince Darius.
Empress Shōken
, also known as, was the wife of Emperor Meiji of Japan.
Catherine Exley
Catherine Exley was the wife of a soldier and accompanied her husband when he served in Portugal, Spain and Ireland during the Napoleonic Wars.
She is best known as the author of a diary that gives an account of military life in that era from the viewpoint of the wife of a common soldier.
Hafsa Hatun
Hafsa Hatun was the wife of Sultan Bayezid I of the Ottoman Empire.

Question: What is the place of birth of Kai Linnilä's wife?
Answer: Helsinki