"Celestia" is actually Princess Celestia's last name, not her first name. Her first name, of course, is "Princess." It's actually a very common name (in cartoons... Maybe... XD).
The Elements of Harmony guidebook states that Luna's original name was Selena and shows development and concept art of the then-named "Princess Selena"/"Night Mare"; these names are used in a Friendship is Magic storybook.
Celestia's actual last name, “Yasuhiro” (安広), literally means “peaceful and spacious”.
Philomena is Princess Celestia's pet phoenix, residing in Canterlot and introduced in A Bird in the Hoof.
Princess Celestia is the benevolent ruler over all of Equestria! She and her younger sister Princess Luna are responsible for raising the sun and the moon to create light and darkness in Equestria.
Princess Luna is Princess Celestia's younger sister who serves as co-ruler of Equestria and uses her magic to raise the moon and safeguards her subjects' dreams during nighttime.
A million years ago, a Celestial named Zgreb the Aspirant came to Earth in search for the Progenitor. Zgreb found the Progenitor and became infected with the Horde. However, the Horde mutated him into a rabid "Dark Celestial," the first of its kind.
Description Meet Galaxias, father of Celestia and Luna and King of Equestria. Crafted by the very Great Creators from a dying galaxy, Galaxias and his wife Nova rule over Equestria justly and are widely beloved.
Celestia can also be very forgiving. She forgave her sister Luna, after she almost had brought the eternal night as Nightmare Moon. It was her who came with the idea of reforming Discord. She also forgave her older sister Ingrid for all the evil actions she did, including killing her lover.
Queen Celestia is an Alicorn pony, the ruler of South Equestria alongside her husband King Hepheus with whom she has a daughter called Gleaming Shield.
While "Dash" and "Sparkle" can be assumed to be the last names of Rainbow Dash and Twilight Sparkle, Tabitha Saint Germain has said in 2018 that Rarity doesn't have a last name. She only has one name, like Cher.
Princess Cadence was a member of the royal family before the war between the Zebra Empire and Equestria. She was an old friend of Twilight Sparkle and the niece of the princesses Celestia and Luna.
Prince Blueblood is a royal male unicorn pony who resides in Canterlot. He is the distant nephew of Princess Celestia and Princess Luna and the cousin of Princess Cadance.
The answer to this question is no. There are three types of alicorns, neither living forever, but some living longer. Born alicorns such as Luna and Celestia live a longer life than other normal ponies, by aging one year every 50 or so years, and maturing much faster than normal kinds of ponies.
Princess Luna and King Sombra's Daughter... Her name is Crystalline Clear | My little pony pictures, My little pony drawing, My little pony dolls.
Sunlight Blaze and Midnight Shine. They are Twilight's twin daughters and she loves them as a mother can love her childreen.
Queen Galaxia, mother of celestia and luna by auveiss on DeviantArt.
Royal retirement
They explain that Equestria is enjoying its longest period of peace in recent years, largely thanks to Twilight and her friends. Because of this, Celestia and Luna have decided to retire and leave the protection of Equestria to the Mane Six.
Prince Orion is the younger brother of Princess Celestia, Princess Luna and Queen Ingrid, being also Cadance's direct ancestor.
Type of Villain
Celestia Ludenberg telling her friends that everything about sticking together in harmony was nothing but a lie. Celestia "Celeste" Ludenberg is a character from the Danganronpa franchise. She starts out as a supporting character, but she is later revealed to be a murderer that has to be brought down.
Celestia is the eldest of the two Royal Sisters, the longest-lived and longest-reigning Equestrian monarch, acting as head ruler of Equestria for over one thousand years due to the timeless ageing of alicorns.
From top to bottom, it's known that the gods in Celestia are preeminent, and beneath them are The Seven or The Archons — the terrestrial gods who command Teyvat's elements. There are seven thrones within Celestia for the seven Archons, and yet the Archons don't seem to be able to travel there.
Alicorn Physiology: Being an alicorn, Celestia can fly and use magic.
If I'm not mistaken, the storybook at the beginning of the pilot showed a pictorial Celestia with pink hair before she banished her sister.