The given name Rhyan is a modern variant spelling of the name Ryan, which has its origins in the Irish Gaelic language. Historically, the name Ryan is derived from the Irish surname Ó Riain or Ó Mulriain, meaning "descendant of Rian" or "son of the little king."

The name Rhyan, like Ryan, can be traced back to ancient Ireland, where it was first used as a surname. The earliest recorded instances of the name Ryan date back to the 12th century, with notable historical figures such as Ryán Mor, a 12th-century Irish chieftain and King of Idrone.

In the centuries that followed, the name Ryan gained popularity and became a common first name among the Irish people. Historically, it was associated with nobility, leadership, and strength, reflecting its origins as a surname derived from the word "king."

One of the earliest recorded individuals with the first name Rhyan was Rhyan O'Malley, an Irish poet and bard who lived in the 16th century. His works were widely celebrated and preserved in the annals of Irish literature.

Another noteworthy figure was Rhyan Fitzsimmons, a 17th-century Irish soldier who fought in the Confederate Wars of the mid-1600s. His bravery and valor in battle earned him a place in the historical records of that era.

In the 18th century, Rhyan O'Connor, an Irish political activist and writer, played a significant role in advocating for Irish independence and preserving Irish culture and traditions.

During the 19th century, Rhyan Doherty, an Irish-American businessman and philanthropist, made a name for himself in the United States. He was widely respected for his contributions to the community and his support for various charitable causes.

Moving into the 20th century, Rhyan Kelly, an Irish-born actor and playwright, gained recognition for his work in theater and on the silver screen. His performances brought the name Rhyan to a wider audience and added to its cultural significance.