Hi. I'm not related to this family.I think this might be the family, in 1930, of Thomas Aloyious whose death certificate you referred to. :
1930 United States Federal Census about Thomas A Mc Garrity Name: Thomas A Mc Garrity [Thomas H Mcgarrity] Gender: Male Birth Year: abt 1883 Birthplace: Pennsylvania Race: White Home in 1930: Philadelphia, Philadelphia, Pennsylvania View Map Marital Status: Married Relation to Head of House: Head Spouse's Name: Margaret G Mc Garrity Father's Birthplace: Northern Ireland Mother's Birthplace: Northern Ireland Household Members: Name Age Thomas A Mc Garrity 47b. 1883 Penn, parents b. Northern Ireland; Agent for Ford Motor Co. Margaret G Mc Garrity 47 -wife- b. 1883 Penn, par b. Penn Edward L Mc Garrity 22 -son- b. 1908 Penn; Clerk General, Office Dept. Store Jane M Mc Garrity 20 -dau- b. 1910 Penn; Stenographer, Office Ins. John J Mc Garrity 18 -son- b. 1912 Penn Thomas A Mc Garrity 16 -son- b. 1914 Penn **
Here is a WWII draft card for Thomas A, Sr.:
U.S. World War II Draft Registration Cards, 1942 about Thomas A Mcgarrity Name: Thomas A Mcgarrity Birth Date: 8 Aug 1882 Birth Place: Philadelphia, Pennsylvania Residence: Philadelphia, Pennsylvania Age: 59 Occupation: Self, unemployed Nearest Relative: Mrs. Margaret G. McGarrity, 6234 Catherine St., Phila., Pa.