Aco

Aco is a South Slavic masculine given name functioning as a short form of longer names beginning with the Slavic element *acs-* or *ak-*, most commonly used as a familiar diminutive of names such as Aleksandar or Acim in Macedonian and Serbian-speaking regions. It developed through the common Balkan practice of forming hypocoristics by taking an initial syllable and adding the suffix -o, a pattern widely seen across South Slavic naming traditions. The name is found throughout North Macedonia and Serbia as both an informal nickname and an independently registered given name.