The given name Kaylie originated in the late 20th century as an Anglicized variation of the Scottish name Cailín, which means "young woman" or "girl" in Gaelic. It is believed to have gained popularity in English-speaking countries as a feminine alternative to the traditional spelling of Colin or Colleen.

The earliest known recorded use of the name Kaylie dates back to the 1970s in the United States, where it was likely influenced by the growing trend of creating unique spellings and variations of existing names. However, the name's roots can be traced back to medieval Scotland and Ireland, where Cailín was a common term used to refer to young women or maidens.

In terms of historical references, the name Kaylie itself does not appear in any ancient texts or religious scriptures. However, its Gaelic predecessor, Cailín, can be found in various Scottish and Irish literary works, such as traditional ballads and folk tales, which often depicted the lives and struggles of young women in rural communities.

Regarding notable individuals bearing the name Kaylie throughout history, the following are some examples:

1. Kaylie Rogers (born 1986), an American actress known for her roles in television shows like "The Parkers" and "Girlfriends."
2. Kaylie Hinz (born 1988), a Canadian figure skater who competed in the 2010 Winter Olympics in Vancouver.
3. Kaylie Remington (born 1991), an American gymnast and a member of the gold medal-winning team at the 2007 World Artistic Gymnastics Championships.
4. Kaylie Pollitt (born 1992), an Australian rules footballer who played for the Carlton Football Club in the AFL Women's competition.
5. Kaylie Simons (born 1997), a British singer-songwriter who gained recognition for her participation in the reality television show "The X Factor" in 2015.

It is worth noting that while the name Kaylie has gained popularity in recent decades, its historical roots and connections to Scottish and Irish culture have contributed to its unique charm and enduring appeal.