In Sri Lanka, funeral customs include mataka-vastra-puja , mataka-bana and mataka-dana. What name is applied to these funereal traditions and what is the alternate meaning of the word?

Buddhist Funeral: Theravada Traditions

http://www.funerals-and-flowers.com/buddhist-funeral.html

"Offering of cloth on behalf of the dead" (mataka-vastra-puja): Prior to a cremation, at the deceased's home or cemetery, the buddhist funeral consists of presiding monastics are offered a white cloth that will subsequently be stitched into monastic robes.

"Preaching for the benefit of the dead" (mataka-bana): Within a week after the funeral (usually the 3rd Day), a monastic returns to the deceased's home to provide an appropriate hour-long sermon for surviving relatives and neighbors.

"Offering in the name of the dead" (mataka-dana) is performed 3 weeks after the funeral service and then annually. This is when the deceased's survivors hold an almsgiving on the deceased's behalf.

Theravada (Pāli: थेरवाद theravāda (cf Sanskrit: स्थविरवाद sthaviravāda); literally, "the Teaching of the Elders" or "the Ancient Teaching", is the oldest surviving Buddhist school. It was founded in India.

https://en.wikipedia.org/wiki/Theravada