A former Woburn resident has donated $100,000 to support the planned renovation and expansion of the public library. Luke Griffin made his gift to the Woburn Public Library Foundation, which was established last year to raise money for the project. The contribution, which Griffin made with his mother, Helen, is the largest the foundation has received and the first to name a space in the library. Griffin, who is on the board of directors of the foundation, made the contribution in memory of his late father, Stephen J. Griffin. Born and raised in Woburn’s South End, Stephen Griffin was an avid reader and book collector. The library’s reading room will be named after him, and the library project calls for the creation of a second reading room. “The reading room is so appropriate, because that’s where my dad spent so much of his time,” Luke Griffin said in a prepared statement. The state Board of Library Commissioners in 2011 approved $9.9 million for Woburn’s library building project, preliminarily estimated to cost $24.5 million. The city is on a waiting list to receive a grant once the state money becomes available. Library and town officials are hoping to cover the remainder of the project costs through private contributions and city funds.