No, the place in the song "How Are Things in Glocca Morra" from the musical Finian's Rainbow was fictitious.
The music was composed by Burton Lane and the lyrics written by E. Y. Harburg. The song was published in 1946 and introduced in the 1947 musical Finian's Rainbow. There is no actual Glocca Morra in Ireland, and the words "Glocca Morra" are not even Gaelic. In a television interview late in his life, Harburg revealed that the name "Glocca Morra" was made up by composer Lane, who had devised a dummy lyric beginning with the line "There's a glen in Glocca Morra". Harburg liked the name but insisted on changing the line to "How are things in Glocca Morra?," as this is more personal.
Isabella Morra died in 1545.
Villa Morra's population is 4,114.
The population of Oued Morra is 4,748.
Veprecula morra was created in 1881.
La Morra's population is 2,668.
Morra Quatro has written: 'Believe'
Paola Morra is 5' 8 1/2".
León S. Morra died in 1948.
León S. Morra was born in 1882.
The population of Morra De Sanctis is 1,366.