Does anyone recognize this family?

1920 Washington Census Stevens County Colville Precinct 3
Enumerated January 9, 1920 pg. (124B)
15
Kostka? Frank Head W M 52 M WI Austria Austria Tailor/Tailor Shop
Rose Wife W F 49 M WI WI WI
Leonard Son W M 06 S WA WI WI
Peters H J Boarder W M 48 S GER GER GER Tailor/Tailor Shop

1930 Washington Census Stevens County Colville Precinct 3
Enumerated April 11, 1930 pg. 1A (90A)
1/1
Richardson Eli Head W M 68 M 20 IL IL IL None Value of Home 1500.00 Owns
Martha J Wife W F 66 M 17 IL MO MO None
Kostka? Pauline GDau W F 06 S WA WI ID Kortka?
Owns Real Property Value $1,500.00. Eli is not a veteran.
2/2
Kostka? Frank Head W M 63 M 24 WI Austria Austria Taylor Taylor Shop
Rose Wife W F 59 M 20 WI WI WI None
Leonard Son W M 16 S WA WI WI None
Peters Ham J Servant W M 59 S Ger Ger Ger Taylor Taylor Shop

I believe Pauline Kostka is the granddaughter of Frank Kostka. Unknown son of Frank married Wanetta Richardson sometime before the 1920 census. I have been unable to find the unknown son & Wanetta Richardson in the 1920 census and it appears that by 1930 they may have been deceased and Pauline is living with the maternal grandparents next door to paternal grandparents.