Sidonia Elizabeth Reck was a Charter Member of the Juneau Igloo Women's Auxilary No. 6.

She was born on February 10, 1900 in Juneau to John and Mary A. Reck.

She married Edward Berto Sparling on September 5, 1917. They had a daughter, Corrine born in Juneau in 1922. She divorced Edward and she was remarried to Armand Ray Duncan on January 17, 1925 in Juneau.

She worked as a bookkeeper for a coal company and later as a dispatcher for a taxi company.

She died in February 2, 1981 in Juneau and is buried in Warrenton, Oregon.

1900/1920 U.S. Federal Census Juneau; Alaska Daily Empire 9-6, 9-8,9-7 1917; Alaska Daily Empire 1-9-1925