I don't know if your search has turned up anything yet...This may be helpful to you:
The second child of George and Harriet Tombaugh was Elmer E. Tombaugh, who was married on
March 19, 1889, at Beatrice, Nebraska, to Dora M. Doffs, daughter of William and Sallie
To Elmer E. and Dora M. Tombaugh was born five children, the oldest being Ethel Pearl
Tombaugh, born January 1, 1890, and who, on January 9, 1913, married Ernest Godfrey
Walstrom, at Sioux City, Iowa. To them were born seven children whose names and birth dates
Louise Gertrude [Walstrom], born September 26, 1913.
Ernest Godfrey, Jr. [Walstrom], born March 18, 1915.
James Ross [Walstrom], born September 3, 1916.
Dora Cecil [Walstrom], born March 4, 1920.
Glenn Eugene [Walstrom], born March 13, 1921.
Carl Maynard [Walstrom], born May 4, 1922.
Allen Gale [Walstrom], born April 9, 1924.
Ethel Pearl Walstrom taught school for some years at different places in South Dakota. Her
husband is a farmer and rancher.
The second child of Elmer E. and Dora M. Tombaugh is Robert Lee Tombaugh, born August 27,
1894. He was married at Sturgis, South Dakota, November 24, 1920, to Anna A. Wurnig, born
August 23, 1900, in Tyrol, Austria, Germany. Their children are Bernard Ray Tombaugh, born
September 9, 1921, and Shirley Roberta Tombaugh, born August 22, 1926.
Robert Lee Tombaugh is engaged in farming and stock raising on a rather large scale, as he is
handling about 2,500 acres. In the late war he served until January 21, 1919, the date of his
Ross Elmer Tombaugh is the third child of Elmer E. and Dora M. Tombaugh. He was born
December 20, 1896, and on July 16, 1923, was married to Lillian Wagner at Sioux Falls, S. D.
The children of this couple are: William Herman Tombaugh, born August 4, 1924, and Laura
Belle Tombaugh, born September 8, 1926.
Ross E. Tombaugh is a farmer at present, but was formerly a rancher in Wyoming and Montana.
His specialty being breaking wild horses for the U. S. Government; rather a strenuous work. He
served in the World War from July 4, 1918, to December 21, 1918.
The fourth child of Elmer E. and Dora M. Tombaugh is Helen Grace Tombaugh, born April 12,
1900. She has held responsible positions with the Lincoln Insurance Company of Fort Wayne, S.
D. [Ind.], and the Mutual Benefit Life Insurance Company of Sioux City. From there she went to
Minneapolis, Minn., attending and securing a diploma from the State University of Minnesota.
The fifth child of Elmer E. and Dora M. Tombaugh is Eugene Ellsworth Tombaugh, born May 6,
1907. He is a graduate of high school at Sturgis, S. D., and is employed by the Loan and Trust
Company of Minneapolis, Minn., the same firm his sister, Helen Grace Tombaugh, is now
Elmer E. Tombaugh was born in Washington County, Pa., but at an early age moved with his
father to Illinois and from there to Nebraska. He moved from Nebraska and his present location is
at Hereford, S. D.
This is excerpted from "Tombaugh History" which you can find online at: