Shortly after their marriage, the Kellys came to Philadelphia and later to Pittsburgh to a place called Soho, PA, a section of Pittsburgh on the Monongahela River. Michael worked copper in a rolling mill, which was very noisy. As a result, he was hard of hearing later in life. The Kellys first lived on Second Avenue, near the mill, before moving on to Craft Avenue and Meyran Avenue.

KELLY is the second most common Irish surname, not far behind Murphy. This surname came into being independently in at least seven widely separated places. In each of these, the eponymous ancestor was Ceallach, a personal name, from the genitive case of which we get O Ceallaigh, the Irish form of the surname. The O'Kellys of Ui Maine, which are concentrated in east Co. Galway and the southern part of Co. Roscommon, are the best known of the Kelly branches.

• Married: 7 AUG 1863 in St. Mary's Chapel, Bridgeton, Glasgow, Scotland
• Note: Their witnesses were John Blaney and Catherine McVey. Michael was listed as a railroad laborer and was living at 74 Stevenson Street in Glasgow. Fanny was a factory worker and living with her family at 54 Bell Street in Glasgow.

1. John Michael KELLY b: 9 SEP 1865 in Pittsburgh, Allegheny Co., PA
2. Mary Frances KELLY b: 5 APR 1868 in Pittsburgh, Allegheny Co., PA
3. Catherine KELLY b: 4 FEB 1871 in Pittsburgh, Allegheny Co., PA
4. Henry S. KELLY b: AUG 1872 in Pittsburgh, Allegheny Co., PA
5. Daniel KELLY b: 4 DEC 1873 in Pittsburgh, Allegheny Co., PA
6. Charles Albert KELLY b: 12 DEC 1875 in Pittsburgh, Allegheny Co., PA