That the Irish underground revolutionary struggle served as an example for both the Irgun and Lechi is known. Yitzhak Shamir's nom de guerre, Michael, was in deference to Michael Collins. Jabotinsky met with Dublin's Jewish Mayor Robert Briscoe who assisted then and later the Irgun.
I now have learned from this that
On the first day of the Easter Rising, 14th April 1914, a Jewish Volunteer, Mr A Weeks was killed outside the GPO in Dublin on the first day of action. Days before he had been laying the Foundation stone of the Adelaide Road synagogue. This was the first Jewish Irish nationalist who died for the cause though he was far from being the acceptation that proved the rule.
In the main, Dublin and Cork Jews were nationalists and republicans whilst many of Belfast’s Jews were loyalist or pro-British. Notable amongst the revolutionaries were Robert Briscoe, an IRA Captain and the first Jewish member of the Dail Eirann (the Irish Parliament) and Michael Noyk who worked closely with the revolutionary leader Michael Collins. My own great-aunts, Fanny and Molly Goldberg joined the revolutionary Cumann na mBan (Women’s IRA) and did everything but shoot: hiding IRA soldiers, nursing and marching.
A bit more. More than a bit more. And on Avraham Weeks.
And on Robert Briscoe.