Elizabeth Gennaro was the wife of Donald Gennaro in the novel canon. They had one child together, Amanda Gennaro. Elizabeth was not happy that her husband had to miss Amanda's birthday party during the Isla Nublar Incident.
In the movies, she is not explicitly mentioned, but a wedding ring is visible on Donald's left hand. In the original script for the Lost World movie, it was said that she filed a lawsuit for her husband's death against InGen.