There are multiple origins and meanings for the name:
1. Persian name (بغلان) «big, elder»
2. Kazakh end Kyrgyz name, meanig «lamb, a young man, the name of small birds»
3. Baglan is a village in Wales. Two Welsh Saints bear this flame, Churches have been dedicated to their labors in Wales, and both are commemorated in litanies dating to the earliest Christian eras of that land.