Weir Family Riverstown/Tawnagh/Collooney and surrounding areas

Hi, I am trying to find out any information on the Weir family (Lough Arrow Riverstown) and surrounding areas.
The Weir family moved to Sligo in the late 1700's and, by all accounts, were a well known family
Launcelot Weir (son of George) boen c1754
Known children: Launcelot, Mary, Eleanor,Francis & William
William (bc1786)married Winifred Tivnan (Various spelling)
Known children: Mary, Rev William Ormsby,Launcelot and Robert Lewis
Robert Lewis (bc1792) married (1819) Hannah Phibbs
Known children: Hannah, Ellen Jane, Maria Irwin, Jane, Robert George, Sarah Irwin, Richard Phibbs, Margaret Anne, William Ormsby, Launcelot, Arthur Cooper
Do you know anything of the Weir family?
Do you know where they are buried?
Any information would be very much appreciated.

Jacqui