I checked the popularity statistics in
Ireland:
https://www.cso.ie/en/interactivezone/visualisationtools/babynamesofireland/
They have statistics available from 1964-2021.
Searán and Searan didn't chart at all (every time there are at least 3 births per year a name would chart).
It is not popular in
Ireland.
I found a few girls named Searán so it seems to be in use (rarely) and it does say online that it comes from
Sharon.
I am wondering if it is a modern attempt to irish-ify a name. This has been done a few times recently with names such as Mollaí or Avagh. People choose a random name (
Molly,
Ava,
Sharon) and try to apply an Irish spelling to it.
It doesn't seem to have any usage as a traditional Irish name.
Please rate my list:
https://www.behindthename.com/pnl/6232