76%RatingSave Gender Masculine Usage Irish Meaning & History From Irish caol meaning "slender" combined with the diminutive suffix -án. Related NamesFamily Tree·Details VariantKeelanOther Languages & CulturesCaelan, Kaolin(English) Cáel(Irish Mythology) User SubmissionCaolan PopularityDetails Last ranked #973 in 1999 England and Wales Last ranked #84 in 2021 Northern Ireland Categories sizes, thinness