According to the 1930 U.S. Census, Katherine (Catherine) Grundman immigrated in 1913. In 1916, she married another Latvian immigrant, Frederick Lukewitz.1 The couple had two sons, Elmer and Robert, and spent several decades living in West Philadelphia. In 1940, for example, they lived at 4127 Ogden St., according to the federal census. Katherine died in November 1960 in Pinellas, Florida.2
1. "Pennsylvania, Philadelphia Marriage Indexes, 1885-1951," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JJ2D-G2K : 7 December 2014), Lukewitz and Catherina Grundman, 1916; citing license number 346079, Clerk of the Orphan's Court. City Hall.
2. "Florida Death Index, 1877-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VV3S-PXV : 25 December 2014), Catherine Grundman Lukewitz, Nov 1960; from "Florida Death Index, 1877-1998," index, Ancestry (www.ancestry.com : 2004); citing vol. 2200, certificate number 43824, Florida Department of Health, Office of Vital Records, Jacksonville.