Olan appears to be a name that is used in various cultures. One plausible origin includes Irish:“Olan is a name of Irish origin, derived from the Gaelic name 'Ó Lionáin', which means 'descendant of Lionán'. Lionán is a diminutive of 'lion', meaning 'warrior' or 'champion.” https://www.thinkbabynames.com/meaning/1/OlanPersonally I’ve always pronounced it OH lun.A famous bearer was Olan Mills, Sr. Who with his wife Mary founded a photography business which was quite popular in the US for many years.
“Olan is a name of Irish origin, derived from the Gaelic name 'Ó Lionáin', which means 'descendant of Lionán'. Lionán is a diminutive of 'lion', meaning 'warrior' or 'champion.”
https://www.thinkbabynames.com/meaning/1/Olan
Personally I’ve always pronounced it OH lun.
A famous bearer was Olan Mills, Sr. Who with his wife Mary founded a photography business which was quite popular in the US for many years.