Trennan is a unique and distinctive given name of Irish origin, derived from an ancient Irish clan name O'Trennan. The name is thought to have originated in County Cork, Ireland, where the O'Trennan family was once seated. Over time, the name has evolved and can be spelled in various ways, including Trennon, Trainor, and even Treanor. Despite these variations, the core essence of the name remains deeply rooted in its Irish heritage. It is a name that stands out, yet still maintains a sense of familiarity due to its connection to more common Irish surnames like O'Connor or O'Reilly.
"Trennan experienced 5 births each in 2013 and 2015, resulting in a total of 10 births over those years."