Fitzpatrick

Hi! Just joined here recently. I am trying to find information on my Fitzpatrick ancestors. My paternal grandmother was Harriet Emily Fitzpatrick(1889-1976) born in Malta andmarried to James Henry Amos Keast. Her dad was James Joseph Fitzpatrick jr(1855-1915) born/baptized in Enniscorthy, Wexford andmarried to Harriet Emily Cox-Barclay. His dad was James Joseph Fitzpatrick sr(1831-????) born/baptized in Rochfortbridge, Meath and married to Joanna Canavan. This is where it gets murky. I believe his dad was Owen Fitzpatrick born/baptized in 1800 in Kells, Meath and married(in Rochfortbridge) to Mary Mal???-I can't make out her last name but on ancestry it says Malone was mother of James sr but marriage is listed as Maliffe. The part of the name I can make out resembles neither. I think his dad was an Owen Fitzpatrick as well(no birth date) and married to Ann or Elinor Lee. Any help you could provide in confirming this or in helping me go farther back with any degree of surety would be greatly appreciated. I am new to genealogy research and most of my info is from Ancestry.ca or familysearch. Thank you in advance.