There were no McMulkin in the 1880 Census for NJ but there were some Mulken. Perhaps they dropped the MC off the name. This is what I found. By the way sometimes people will not respond when your request is too broad. A single first name and census year a day is appropriate. Gail Stillings-Murphy Census Place: Jersey City, Hudson, New Jersey Source: FHL Film 1254783 National Archives Film T9-0783 Page 51A Relation Sex Marr Race Age Birthplace Henery MULKEN Self M M W 28 ENGL. Occ: Liquor Fa: ENGL. Mo: ENGL. Emma MULKEN Wife F M W 26 NY Occ: Housekeeper Fa: ENGL. Mo: ENGL. William MULKEN Son M S W 1M NJ Fa: ENGL. Mo: NY Census Place: 5th Ward, District 2, Elizabeth, Union, New Jersey Source: FHL Film 1254800 National Archives Film T9-0800 Page 262B Relation Sex Marr Race Age Birthplace Martin W. BRETT Self M M W 32 NY Occ: Ship Broker Fa: NY Mo: WEST INDIES Sarah S. BRETT Wife F M W 32 NJ Occ: Keeping House Fa: NJ Mo: NJ Benjamin M. PRICE FatherL M W W 70 NJ Occ: Retired Merchant Fa: NJ Mo: NJ Marie BRETT Mother F W W 50 WEST INDIES Occ: At Home Fa: WEST INDIES Mo: WEST INDIES Augustus BRETT Brother M W 23 NY Occ: At Home Fa: NY Mo: WEST INDIES Annie A. DELANEY Other F S W 20 ENG Occ: Servant Fa: IRE Mo: IRE Annie MULKEEN Other F S W 19 IRE Occ: Servant Fa: IRE Mo: IRE