| Notes |
- Family Note: Who were Mr. and Mrs. Arthur Kaufman?
That they were related to Minna Kost, Frederick W. Kost's unmarried sister, seems indisputable, based on the numerous mentions of them in the Patchogue Advance newspaper and Minna's obituary in the New York Times. In one Advance account, Mr. Arthur Kaufman (Sr.) was Minna's "cousin." In another, Reginald Kauffman (Arthur's brother) was identified as Minna's "cousin." A Herbert Pendleton of Bradford (PA) is identified as her "nephew"—he was a son of Arthur's sister who married a Mr. John Pendleton and resided in Bradford. Arthur Kauffmann, Jr., son of Mr. and Mrs. Arthur Kauffmann, was mentioned as being Minna's "nephew."
The New York Times obituary for Anna (Minna) Kost, identify a Mr. and Mrs Arthur Kaufman as being her "cousins." Strictly speaking then, they would have been the children of one of Minna's parents' siblings. Her parents are here identified as Joseph and Catherine Kost. We have not yet identified any of Joseph's or Catherine's siblings.
Local remembrances of them are that Mrs. Arthur Kaufman was "Minna Kost's sister." However, by now most of these remembrances are second hand. One somewhat ambiguous Advance newspaper account mentions her given name as Aileen (she was more definitely identified as Aileen from the census record). Minna apparently had only one sister, Emma. If Mrs. Arthur Kaufman had been Minna's sister, she would seem to have been too old to have had Arthur, Jr., who was mentioned as having been in the Navy during World War II, and as having attended the Merchant Marine Academy previously. And if she were Minna's sister, it was odd that the relationship between Minna and Mrs. Arthur Kaufman was never identified in this way.
While the next generation children, Arthur Kaufman Jr. and Herbert Pendleton are identified in the Advance as "nephews," strictly speaking they would have been 1st cousins once removed.
Census data provides some clarity. In the 1900 census, Arthur (aged 9) and others are found as children in the household of Emil and Hattie Kaufman on Staten Island. In the 1920 census, Reginald Kaufman (aged 17) was found as a son in the household of Emil and Hattie Kaufman of Staten Island. In the 1930 census, Reginald Kaufman, Hattie Pendleton (daughter), and Herbert Pendleton (grandson) were found in the household of Hattie Kaufman on Staten Island, as was Arthur and his wife Aileen and son Arthur Jr.
Some have said that Mrs. Kaufman was the proprietor of a guest house—specifically the Hawkins house at 311 Beaver Dam Road, Brookhaven, NY. No supporting evidence has yet been found to support this.
Working hypothesis: Emil or Hattie Kaufman are siblings of Joseph or Catherine Kost, parents of Minna and Frederick Kost. If Emil is the relationship, then Catherine's birth surname was Kaufman; if Hattie is the relationship, then her birth surname was Kost or another (she could be a sister to either Joseph or Catherine); however, since Hattie's parents were born in Vermont, a relationship through Hattie is unlikely; no connection of the Kosts to Vermont has yet been found. It is unlikely that Mrs. Arthur Kaufman was Minna's sister.
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