Where does “Kolhumadulu” come from?

Kolhumadulu (English) comes from Dhivehi ކޮޅުމަޑުލު, from Dhivehi މަޑުލު, from Sanskrit मण्डल, from Sanskrit -ल, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “Kolhumadulu”, step by step

StepLanguageWordMeaning
1Dhivehiކޮޅުމަޑުލު
2Dhivehiމަޑުލުatoll
3Sanskritमण्डलcircular, round; disk; anything round
4Sanskrit-लan adjectival or nominal suffix: relating to, belonging to, having, similar to, etc
5Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lósEvery word from Sanskrit -लEvery word from Sanskrit मण्डल