The name Rilee is a relatively modern name with roots that can be traced back to Ireland. It is believed to have originated as a variant spelling of the Irish name Raighilligh, which itself is derived from the Gaelic word "raith," meaning a fort or earthen rampart.

In its earliest known usage, the name Raighilligh was found in ancient Irish genealogical records, often referring to members of prominent families or clans associated with specific fortified settlements or territories. The first recorded instance of the name variant Rilee dates back to the late 17th century, when it appears in parish records from County Cork, Ireland.

One of the earliest notable individuals with the name Rilee was Rilee O'Sullivan, a renowned Irish poet and bard who lived in the early 18th century. His works, which celebrated the history and culture of his native County Cork, helped preserve the name's Irish heritage.

In the 19th century, the name gained some popularity among Irish immigrants to the United States and Canada. One notable figure was Rilee McKenzie, a Canadian soldier who fought in the Fenian Raids of 1866, a series of battles between Irish nationalists and British forces along the Canada-United States border.

As the name continued to spread in the English-speaking world, it began to take on new spellings and variations. One notable individual from this period was Rilee Evelyn, an American author and journalist born in 1875, who wrote extensively about women's rights and social issues.

In the 20th century, the name Rilee saw a resurgence in popularity, particularly in the United States. One prominent individual was Rilee Johnson, an African American civil rights activist and community organizer born in 1912, who played a pivotal role in the Montgomery Bus Boycott of 1955-1956.

Another noteworthy figure was Rilee Fielding, a British actor and playwright born in 1937, whose works explored themes of class, identity, and relationships. His most famous play, "The Dressmaker's Daughter," premiered in 1985 and earned critical acclaim.

While the name Rilee has its roots in Irish culture, it has since gained a more global presence and appeal. Its unique spelling and connection to the concept of fortification or strength have contributed to its enduring popularity across various cultures and communities.