From Wiktionary, the free dictionary
First recorded in 1532. From Mārtiņš (“Martin”).
Mārcis m
- a male given name
- Klāvs Siliņš: Latviesu personvārdu vārdnīca. Riga "Zinātne" 1990, →ISBN
- [1] Population Register of Latvia: Mārcis was the only given name of 2104 persons in Latvia on May 21st 2010.