Greta Marie Andersen (married names Jeppesen and Sonnichsen and Veress, 1 May 1927 – 6 February 2023) was a Danish swimmer who won a gold and a silver medal in 100 m freestyle events at the 1948 Summer Olympics.

[2] She failed to finish her 400m freestyle race due to sudden stomach cramps – she fainted and was rescued from drowning by fellow competitors Nancy Lees and Elemér Szathmáry.

[3] According to her recollections, an injection the swimming team's medical doctor gave her to delay her period caused her legs to be paralyzed and for her to subsequently faint.

[9] After a previous marriage (Valby, Copenhagen, 1952) to Danish engineer Helge Jeppesen ended in divorce, Andersen married John Sonnichsen in Long Beach in 1957.

[1] Andersen and Sonnichsen divorced, and in 1966 in Nevada she married Hungarian-born doctor Andre Veress; the couple lived for many years in Huntington Beach.