I can't find Howard and Ruby MACKLIN on the 1930 census.
There was a Ruby LAWRENCE on the 1920 census in Cleveland.
But by 1950's their daughter, Ruby was "Mrs Ruby COATS". Do you think Ruby married again?
1920 census Jan 6 Cleveland ward 15, Cuyahoga co, OH
Albert Lawrence 33 b <1887> ENG ENG ENG immigr-1910;foreman
Daisy Lawrence wife 33 b <1887> PA TN TN
Ruby Lawrence 15 b <1905> OH ENG TN
Vera Lawrence 6 b <1914> OH ENG TN
Albert Lawrence 5 b <1915> OH ENG TN
Thelma Lawrence 3 b <1917> OH ENGT TN
Ruth Lawrence 1 b <1919> KY ENG TN
1930 census Apr 9 Cleveland, Cuyahoga, OH
Albert C Lawrence 45 b <1885> ENG ENG ENG mar at 26-engineer
Daisy D Lawrence wife 44 b <1886> TN TN TN mar at 25
Thelma H Lawrence dau 13 b <1917> OH ENG TN
Ruth M Lawrence dau 11 b <1919> OH ENG TN
Roy N Lawrence son 7 b <1923> OH ENG TN
Gladys D Lawrence son 5 b <1925> OH ENG TN
Frederick E Lawrence son 3 b <1927> OH ENG TN
Albert H Lawrence son 15 b <1915> OH ENG TN
Source: Cleveland Necrology file Reel#128; Id#: 0599762
Daisy Lawrence, Date: Jun 28 1952; Source: Cleveland Press;
Notes: Daisy Lawrence, residence, 7706 Dix Ct., beloved wife of Albert, mother of Albert, Roy, Fred, Mrs. Vera Brooks, Mrs. Thelma Kalbfliesch, Mrs. Ruth Gynn, Mrs. Gladys Manion, Mrs. Ruby Coats, grandmother and great-grandmother. Friends may call at Loree A. Wells Funeral Home, 8806 Euclid Ave. Services Monday, June 30, 2:30 p. m.
Source: Cleveland Necrology File, Reel# 128 Id#: 0599721
Altert Lawrence, Date: Feb 27 1956;
Source: Cleveland Press;
Notes: Albert Lawrence, husband of the late Daisy, father of Albert, Roy, Fred, Mrs. Vera Brooks, Mrs. Thelma, Kalbfliesch, Mrs. Ruth Gynn, Mrs. Gladys Manion and Mrs. Ruby Coats, grandfather and great-grandmother. Friends may call at Loree A. Wells Euclid Ave. Funeral Home, 8806 Euclid Ave. Services Tuesday, Feb. 28, at 1 p. m." -end--
Note - I am not related.