I am looking for the birth record and parents of Ella Rosa Imogene Montejo Jenkins, married name Carlin. She claimed to have been born in Louisiana in about 1843. The use of the double surnames suggests that her mother's maiden name was Montijo. She affected a very Spanish style and stuck to the name Montijo/Montejo to her death in London, England in 1914.
She claimed to be an orphan, her mother having died at childbirth, but this could have been at the birth of her supposed brother Edward Jenkins in 1846.

In the 1880s there were two Montejo Brothers from Cuba with plantations and sugar refining interests on the Bayou Teche in St Mary’s Parish and in Iberville and on the Bayou Sara in Opelousas Parish where the Montejo family had the Retreat Plantation in 1885.

M. A. Montejo and his brother F. J. Montejo and perhaps other brothers arrived in New Orleans in the 1870s but M.A. Montejo, an engineer, may have been in college in the US before that. He and his sister Mercedes Sherman Montejo Sherman were associated with the Cuban Liberation Junta in New York and Philadelphia in the later 1860s.
Ella Rosa’s husband Captain James Carlin knew the Montejo in the Junta. He leased the Chatsworth Plantation in St Mary’s in 1870. Montejo appears in New Orleans in an anonymous report from about 1820 and a work of fiction in 1864.

Are there any sightings of these Montijo in Louisiana in court records or land plats or elsewhere before 1870?