I dont know of any canon source mentioning Lunas middle name.
Luna full name harry potter. Luna was a good friend of Ginnys and Moony was Lupins nickname s. Dawn French was born on October 11 1957 in Holyhead Wales as Dawn Roma French. Of course they wouldnt name their daughter Lupin or Lupina but they could name her Luna a feminine name close to it.
In the movies Luna is referred to as Loony Lovegood and is mocked for what her fellow students perceive as strange interests death thestrals and Wrackspurts to name a few. They never really talk about it but its sprinkled over the pages in snatches of dialogue and quick moments that taken together add up into the big picture. Born in the town of Termonfeckin in Ireland she is one of four children to Donal and Marguerite Lynch.
I dont know for sure why Luna was chosen for his kids name but I can say that she was a strong presence in his life and how she viewed Harry Ron and Hermione as her best friends the drawings of them on her walls in her room when so few people were willing to befriend her. In the early drafts Lunas name was Lily Moon until Rowling changed it. Luna means moon in Latin.
Luna is a quirky fourth year Ravenclaw student. Classmates call her Loony Lovegood and make fun of her as she has persistently misty eyes a dreamy voice and believes fully in creatures that dont exist and a number of conspiracy theories. The initial series of 7 books has also expanded into other works that exist around Harrys story within the Wizarding World created by Rowling.
These Harry Potter Dog Names include some names that are popular even outside of Harry Potter like Luna and others that are very unique to Potter like Hermione or Hagrid. She started her education at Hogwarts School of Witchcraft and Wizardry in 1992 and became good friends with Ginny Weasley. The boy and girl names from the Harry Potter series by JK.
Evanna Patricia Lynch born 16 August 1991 is an Irish actress and activist. Harrys youngest and oldest kids are named after the Mauraders in some was. Since Luna is Pandoras oldest daughter and only child thats the most likely possibility.