Cian Mooney was the passenger in the car that was involved in a single-car collision at Dowling on Wednesday evening.
A Garda spokesman said the teenager was pronounced dead at the scene of the incident that left two other people in hospital.
One of the men remains in a serious but stable condition and the second has injuries which are not believed to be life-threatening.
Tributes have been flowing in for Cian, who is survived by his broken-hearted parents, Sylvia and Eamon, and his sisters, Beibhinn, Caoimhe, Saidhbh, and Méabh.
According to RIP.ie, Cian, who was “tragically taken aged 17 years”, of Moneenroe, Castlecomer, will be laid to rest after a funeral service at his home on Monday at 11am.
The service will be followed by removal via The Glen to Newlands Cross Crematorium for 2pm. The crematorium will be private.
In the condolences section, people have left numerous messages of sympathy for his parents and his family.
“No words for the loss of beautiful Cian,” one person has written. “Such a loss for you all. Thinking of you all at this difficult time. May his soul rest in peace.”
Another has added: “To Eamon, Sylvia, girls Eamon, Mary and family. We are saddened for you all about the loss of Cian. We will miss waving at him with Eamon in red van heading off farming.”
One person added that they were, “so very sorry for you the parents and siblings and family on the loss of Cian. May You find strength in the days ahead.”
“Deepest Sympathy to all of Cian’s family on your tragic loss,” one other person has written. “Our Thoughts and prayers are with you at this sad and difficult time. May Cian’s gentle soul rest in peace.”
In other tributes posted online in the aftermath of his tragic passing, one person said Cian was a "lovely young man taken way too soon."
Another added: "Cian was a beautiful boy with a heart of gold. Our own hearts are heavy with sadness."
A third added: "A beautiful young man gone too soon."