Add a Memory
Send Flowers
Make a Donation
Obituary
Guest Book
Thilantha Senarath Gunasekara, born on February 1, 1959, in Sri Lanka, passed away peacefully on August 13, 2025, in St. Louis, Missouri, surrounded by his loving family. Thilantha was a devoted husband, father, and grandfather, and he will be dearly missed by all who knew him.
He is survived by his beloved wife, Yamuna, and their two sons, Sasika and Dinuka, and his daughters-in-law, Tharuka Jayasingha (Sasika's wife) and Janithri Wickramanayake (Dinuka's wife). Thilantha derived immense joy from his role as a grandfather to Kimaya and Yenul. His family was his greatest treasure, and he cherished every moment spent with them.
Thilantha also leaves behind his sister, Nirmalie Fernando; brothers, Irusha and Jai; and brothers-in-law, Amal Fernando, Nihal Yapa, Vishwa Lokugamage and Walter Boteju; and sisters-in-law samitha, Maheshi, Lalithangi and Dushanthi. He is remembered fondly by a host of other family members and friends who were fortunate to have shared part of their lives with him.
Thilantha received his primary and secondary education at Nalanda College, Sri Lanka, and was employed as the General Manager at Metropolitans, Sri Lanka and Singhagiri (Samsung) Sri Lanka, before moving to California, in 2007, where he was an accountant at Sunland Group and then at Taste Nirvana until 2023. During the last year of his life, he moved to St Louis, Missouri along with his, wife to be closer to his younger son, Dinuka and his family.
Throughout his life, Thilantha had a great love for traveling, often exploring new places and making new memories. He was an avid woodworker, a handyman who could figure out how to fix anything around the house and a gardener, spending countless hours creating, fixing and cultivating with skill and passion. Music brought him joy, and he enjoyed listening to songs from ABBA and other music from the 80s that resonated with his soul. In addition, he had a penchant for watching documentaries, feeding his curiosity about the world.
Thilantha was preceded in death by his father, P.S Gunasekara; mother, Irene Gunasekara; and sister, Roshanara (Roshi) Boteju. Their memories lived on through him, and he carried their legacies in his heart.
Thilantha’s life was rich with love, laughter, and exploration, and he leaves behind a feeling of warmth that will forever live on in the hearts of his family and friends.
A visitation will be held in his honor on August 17, 2025, from 11:00 AM to 1:30 PM, followed by a funeral service from 1:00 PM to 3.30pm at Newcomer Funeral Home, West County, located at 2211 Clarkson Rd, Chesterfield, MO 63005.
To plant trees in memory, please visit the Sympathy Store.
2211 Clarkson Road, Chesterfield, MO 63017
Memories and condolences can be left on the obituary at the funeral home website.
Send flowers
Consider sending flowers.
Add photos
Share their life with photo memories.
Plant trees
Honor them by planting trees in their memory.
Follow this page
Get email updates whenever changes are made.
Donate in Memory
Make a donation in memory of your loved one.
Share this page
Invite other friends and family to visit the page.
The nightly ceremony in Washington, D.C. will be dedicated in honor of your loved one on the day of your choosing.
Read moreWhat kind of arrangement is appropriate, where should you send it, and when should you send an alternative?
Read moreWe'll help you find the right words to comfort your family member or loved one during this difficult time.
Read moreIf you’re in charge of handling the affairs for a recently deceased loved one, this guide offers a helpful checklist.
Read moreLegacy's Linnea Crowther discusses how families talk about causes of death in the obituaries they write.
Read moreThey're not a map to follow, but simply a description of what people commonly feel.
Read moreYou may find these well-written obituary examples helpful as you write about your own family.
Read moreThese free blank templates make writing an obituary faster and easier.
Read moreSome basic help and starters when you have to write a tribute to someone you love.
Read more