Princess Lilian was "a credit to Swansea", her first cousin Barbara Davies, who was also born in the city, told ITV News.
"She had an exciting life. While living in Stockholm, she did have a degree of privacy."
"From my conversations with people in Sweden they were in high praise of her conduct."
More top news
England enjoyed a winning send-off to their Australia tour as they recovered from early problems leaving Wales floundering.
Veteran singer Sir Tom, 75, is gearing up for his first concerts since wife Linda died after a "fierce" battle with cancer in April.
It will be a dry and fine day across the country with plenty of warm sunshine and light winds.