She was only 5 years old when her mother died.
Saint Alphonsus Maria de Liguori died on August 1, 1787 at the age of 90.
Saint Francis of Assisi died at the age of 44 in 1226.
There is no record or tradition but Anne probably died of natural causes - old age.
Saint Brigid or Bride died when she was 70 and got to meet Saint Patrick and Saint Brendan.
Saint Luke is believed to have died in the year 84 AD in Boeotia, Greece.
Saint Rafqa died on March 23, 1914, at the Convent of Saint Joseph, Grabta, Lebanon, of natural causes at the age of 81.
St. Helena, the mother of Constantine the Great, died about the year 328 of natural causes, probably of old age as she was in her 80s.
David of Wales was about 59 years of age when he died.
Saint Peter died and entered Heaven as a saint when he was about 65 years old.
I can find no reference to any saint by the name of Naomi.
There are several saints named Felicity so you need to be more specific.
Cameron, who died as a martyr at three years of age in Sardinia, is not a patron saint.