I am a subscriber of the ANDERSON county Texas board, not related.
Chicago IL is in Cook county. Canadian Texas is in Hemphill county. Did you post your query to the ANDERSON surname board ? It is always better to post full birth dates and death dates if known. I find no Anderson in SS death record in Hemphill county who was born in 1921.
O G ANDERSON
28 Jan 1924 - 15 Oct 1987
Last residence 79014 Canadian, Hemphill, TX
Last SS benefit paid 79014 Canadian, Hemphill, TX
1930; Census Place: Chicago, Cook, Illinois; Roll: 460; Page: 1A; Enumeration District: 2661; Image: 528.0.
ANCKA Anderson age 29 [misread name in transcription] born abt 1901 in Iowa married Sadie when he was 21, father & mother from Sweden, rented home 2951 Congress St $33.00 month rent, they had a radio, he was a baker at bakery shop.
Sadie Anderson age 36 born abt 1894 in Pennsylvania, father listed as PA, mother MO.
Oscar J Anderson age 6 [enumerator assumed middle name spelled JERALD]
William U Anderson age 4
Herald E Anderson age 2
I find an Oscar W Anderson in Caldwell, Appanoose Co, IA in the 1920 census whose parents were from Sweden, he was listed as age 18. He is residing with a Henry J Dray and his family. In the household was a Pete Anderson born abt 1856 in Sweden who was a widower, worked in coal mine and Oscar W was farm laborer, several other boarders who worked the coal mine. There were two other Oscar's born abt 1901 from Iowa whose parents were from Sweden but had no middle initials.
1920 & 1910
John A Anderson born abt 1860 Sweden in Burlington, Des Moines, IA, came to US abt 1888
Emma, wife, born abt 1862 Sweden, came to US 1888
Carl E, son, born abt 1890 IA
Harry L, son, born abt 1894 IA
Ellen, dtr, born abt 1897 IA
Oscar, son, abt 1901 IA
Oscar Anderson in Bluff Creek, Monroe county IA who was married to a Mary
No Sadie Mangus found in the 1920 census born abt 1894 in Pennsylvania.
In the 1910 census I find a Sadie born abt 1894 with mother Salma ? who was born abt 1853 in PA. They were residing in Paint, Somerset county PA.
1910, Lincoln, Putnam Co MO
Andrew P Anderson born abt 1856 Sweden
Hilma, abt 1861 Sweden
Rena abt 1890 IA
Jennie M abt 1892 IA
Minnie E abt 1895 IA
Oscar, age 8
I find no "Pete" Anderson in 1910 record.
1900; Census Place: Shade, Somerset, Pennsylvania; Roll: T623 1487; Page: 1B; Enumeration District: 192.
Ana...? Manges 55 head of household born 12/1844 PA, married 27 yrs
Saloma Manges 46 wife 2/1853 PA, 11 living children of 12
Effie Manges 21 3/1879
Irene D Manges 19 11/1880
Oty E Manges 15 son 12/1884
Leola F Manges 14 2/1886
Ioonie s Manges 10 dtr 3/1890, probably Iona
Amy O Manges 8 12/1891
Sadie E Manges 6 2/1894
Most of the 1890 census burned in 1921.
1880; Census Place: Richland, Cambria, Pennsylvania; Roll: T9_1110; Family History Film: 1255110; Page: 202.3000; Enumeration District: 189; Image: 0407
Annanias Mangus age 35 born PA, parents PA
Saloma Mangus age 27 born PA, parents PA
Gracie Mangus age 6
Minah Mangus age 5
Eliza Mangus age 4
Effie Mangus age 1