Jelte, Face of Serious Request 2024, Passes Away at Age 5
Jelte, a 5-year-old from Leeuwarden, died early Tuesday morning following a battle with metachromatic leukodystrophy (MLD), according to an Instagram announcement by his parents. MLD is a rare, fatal disease causing rapid nervous system deterioration. Jelte served as the face of Serious Request 2024, which raised funds for Metakids.
How did Jelte’s condition progress?
According to the family’s Instagram post, Jelte died at 4:00 AM Tuesday in his parents’ arms. The family noted he began to take leave of life around 11:00 PM Monday night.
Parents reported they watched over him for two hours before falling asleep. The family stated that while the loss is sad, the process was peaceful.
What is metachromatic leukodystrophy (MLD)?
MLD is a rare and fatal disease that leads to a rapid deterioration of the nervous system, according to the family. Despite the severity of the diagnosis, the family noted Jelte continued to enjoy the small things in life.
How did Jelte contribute to metabolic disease awareness?
Jelte was the public face of the 2024 Serious Request campaign. This effort focused on collecting funds for Metakids, an organization supporting children with metabolic diseases.

His father, Hein de Haan, furthered these efforts by organizing a scooter trip. The event was designed to raise money for other children suffering from metabolic conditions.
What is the current status of the family?
The family announced they will spend the coming hours and days in a small circle. Future activities regarding MLD awareness may depend on the family’s wishes as they grieve.
Frequently Asked Questions
Who was Jelte?
Jelte was a 5-year-old from Leeuwarden who served as the face of Serious Request 2024 to raise money for Metakids.
What is metachromatische leukodystrofie (MLD)?
MLD is a rare and fatal disease that causes the nervous system to deteriorate rapidly.
How did Jelte’s father raise money for the cause?
Hein de Haan organized a scooter trip to raise funds for children with metabolic diseases.
How can communities better support families facing rare pediatric diseases?