I have a good bit of information about that branch of the Lenahan Family ... it's mine!
Several of the sisters never married; the only married ones I know of were James (my grandfather - 4 children), Frank (not sure one or 2 children, but Frank Jr.); Alice 1 boy, John Gallagher Jr.); and Rose (no children)
James A. Lenahan Sr. married Marie Conway (don't have all of the years here – I'm at my office).
The had 4 children: James (b. 1920 – my father); Mary, Edward, and Joseph
James A. Jr. married Elizabeth R Doetsch in 1940; they had 4 children – James A III (b 1941), Ernest Edward Sr. (b 1943), Patricia Anne (b 1948), and Nora Jeanne [me (b 1960) – named for Honorah]
Mary Lenahan married Leonard T. Davis; they had 4 children – Kathryn Anne, Mary Kathryn (nickname Molly), Anne Mary, and James.
Edward Lenahan Sr. married Mary Schwab; they had 3 children – Edward Jr., Anne Marie, and Robert
Joseph Lenahan Sr. married Dolores "Dorry" _____ (can't remember her maiden name right now); they are 4 children – Susan, Joseph Jr., Thomas, and John
How far do you want this info – I can give you the great-grandchildrens' spouses and children; and some of the great-great-grandchildren.