From Memoirs of Allegheny County, Pennsylvania:
(PETER BERT) Mr. Bert was married, on April 10, 1859, to Miss Apolonia Lockhart, a native of Germany, and has had by this union eleven children, of whom the following seven are living: G. Henry, Elinor E., Albert, Frank, Edward, Annie Mary and Bertha. Mr. Bert and wife have thirteen grandchildren.
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