I've just come across this topic and notice in the article it mentions
"Perhaps even more emotionally devastating, his first wife, Kathleen, unexpectedly died in 1967 from a virulent flu virus. She was just 33, leaving him a widower with two small sons."
Wasn't Kathleen his second wife, his first wife being Elena Konstantinovna Dourneva?
Yes indeed! Prince Andrew has been married three times. He was married first in San Francisco on 9 September 1951 to Elena Dourneva (1927—1992). They had one son before divorcing in 1959.
Prince Alexis Andreevich Romanov (born 27 April 1953)
He was married secondly to Kathleen Norris (1935–1967) whom he married on 21 March 1961 in San Francisco. They had two children. Kathleen Norris was a granddaughter of American authors Kathleen Norris and Charles Gilman Norris.
Prince Peter Andreevich Romanov (born 21 November 1961)
Prince Andrew Romanov Jr. (born 20 February 1963)
He is presently married to Inez von Bachelin (born 1933).