Cool Family History
Cool Surname Meaning
Irish and Manx: from Gaelic Mac Dhubhgaill Manx Mac Dowal ‘son of Dubhgall’ (‘dark stranger’ i.e. Dane). See Irish McCool. Alternatively a shortened form of Mac (Giolla) Comhghaill ‘son of (the devotee of) Saint Comhghal’. See McCool.
Dutch: variant of Kool or Koel. Probably an Americanized form of German Kuhl and Kühl (see Kuhl).
Source: Dictionary of American Family Names 2nd edition, 2022