The extra n makes it feel less like an feminization of Alan and more like a name unto itself. Alanna is more common in Puerto Rico than the original Alana.

Alanna

Alianna barely wedged its way into US Top 1000 in 2015, and almost fell off with a Number 998 finish in 2016. The second n doesn't add much, so Aliana or even Eliana might be better options.

Alianna

Elianna and the even more popular Eliana are multicultural favorites that have been rising through the US Top 1000 since the turn of the century.

Eliana ranks highly throughout the English-speaking world while variation Elianna plays catchup. The -anna ending might make this more of an honor name for an ancestral Anne or Anna.

Eliana may have roots in the Latin family name Aelius, related to the Greek helios, which means son. In Hebew, El means God and ana means answered, which may make Elianna or Eliana a good name for a prayed-for child.

Elianna

The Italian Gianna undoubtedly owes much of its popularity in the US to its status as an honor name for John. Before the importation of Gianna, there was no truly workable feminine form of John, so Gianna found widespread favor among American parents with Italian roots and far beyond.
 
Gianna originated as the feminine form of Gianni, the Italian form of Johnny, a diminutive for Giovanni or John. The root name among these is the Hebrew name Yochanen, meaning "God is gracious." The Italian long form of Gianna is Giovanna, and common nicknames include Gia and Gigi.
 
This Italian classic entered the U.S. list in 1989, breaking into the Top 100 in 2006. Also on the U.S. list are Giovanna, Giana and short-form Gia, which was used by Matt Damon and Mario Lopez.

Gianna

Guilianna

Halianna

Iliana is one of the vaguely but usually undefinably international names that have a wide range of spellings and pronunciations. Ilium was the poetic name of the city of Troy, and variations of this name — especially Ileana and Ileanna — have been widely used, projecting a rather bohemian image.

Iliana

A rarely used Slavic name until the Czech-born ex-Mrs. Trump took it over the top. Daughter's name Ivanka adds a dollop of charm. 

Ivana

Isanna

Jilliana

Together with Julian, the name Juliana/Julianna derives from Julius, a Roman family name. Its origin is shrouded in history, but possible roots include Latin iuvenis, meaning "youthfu"; Greek ioulos, meaning "downy-bearded"; or Jovis, a form of Jupiter, which means "sky father".

 This spelling, popularized by popular actress Julianna Margulies, is climbing up the lists. One of the Dixie Chicks--Emily Robison--used it for her daughter.

Julianna

Keliana

Subtle botanical choice with cross-cultural appeal. Streamlined Liana is more common.

Lianna

Frilly and fit for a princess, but with plenty of spark and flair, Liliana holds international appeal and a modern glamor. Joining Lily and Lillian in the US Top 100 for the first time in 2022, Liliana is a fast-rising choice for girls. 
The Latinate form of Lillian, Liliana has two separate roots. It originally emerged from a 16th century diminutive of Elizabeth, with the meaning “God is my Oath,” and this lends the name a more solid and regal air. 
Perhaps the more obvious and popular origin for Liliana though, is as an elaboration of Lily, from the Latin word “lilium”, giving it a pretty, bright and floral feel. 
A favorite among the Hispanic community, Liliana is also trending in Czechia, Hungary, and Poland. But it is a name that crosses cultures, as demonstrated by its recent popularity in the US, and its upward climb on the English and Welsh charts. 
Notable Lilianas include the actress Liliana Mumy, who starred in Cheaper by the Dozen and the film director, Liliana Cavani, who created The Night Porter. Lilliana Ketchman of Dance Moms fame is another well-known bearer, albeit with a slightly different spelling. 
Sophisticated but sweet, Liliana is chosen for more than 2500 girls in the US every year and if it continues on the same trajectory, could one day catch up with the Top 50 choices. Lily and Lillian. 
With 10 members of the “Lily” family in the US Top 1000, and several “-ana” names ranking highly, Liliana certainly makes a stylish and on trend choice for a baby girl today. 
If you want your Lily to stand out however, Lillia, Lilium, Lilias and Lilibet are currently less popular options. Alternatively, Anneliese, Liviana, and Linnea could be worth exploring.

Liliana

Lushly elaborate name that makes Lucy more grownup and sensual.  Carnie Wilson chose it for her daughter.  Lucianus is an ancient Roman family name and Lucianus of Samosata was an early satirist.  Heard most often in the Italian and Spanish cultures, Luciana is usually pronounced loo-chee-anna.

Luciana

While Marianna looks like a spelling variation of Mariana, the two names have different etymologies. While the one-N spelling derives from the Roman name Marianus, Marianna is a combination of two classics, Maria and Anna, used in many European languages.

 Marianna was on and off the US Top 1000 list throughout the twentieth century, and it has now ranked consistently since 1995. While it has never appeared in the upper half of the US popularity charts, it's a very popular choice in Italy and Poland.

 The meaning of Maria is uncertain, but theories include "drop of the sea" (from Hebrew roots mar "drop" and yam "sea"); "bitter" (from Hebrew marah "bitterness"); and "beloved" (from the Egyptian root mr).

Marianna

Nilianna

Orianna

Quianna

Quintanna

If you're ready to move beyond Anna and Hannah, consider this traditional Scandinavian short form of Susanna, historically very popular in its native lands.

 Sanna is also a modern Inuktitut form of Sedna, the Inuit goddess of the sea, sea animals and the underworld.

Sanna

Silvana

A bright and warm possibility for a summertime girl, Solana has been heard in a few video games. Solana Rowe is the real name of the singer known as SZA. Names with sunny meanings are red-hot, with Soleil, Sunny, and Sol amongst the most fashionable today. Spanish Solana — meaning "sunshine" — is a welcome addition to the party that entered the US Top 1000 for the first time in 2023.

Solana

Popular Russian name, familiar here via author Svetlana Stalin, the dictator's daughter. 

Svetlana

Tatiana was derived from Tatius, a Sabine-Latin family name of unknown origin. Titus Tatius was the name of an ancient king who ruled over the Sabines, an ancient Italic tribe who lived near Rome. The Romans used the name Tatius even after the Sabines died out and created the derivative forms Tatianus and Tatiana. The names were eventually disseminated throughout the Orthodox Christian world, including Russia.
 Saint Tatiana, a third-century martyr, is venerated in the Eastern Orthodox Church. Grand Duchess Tatiana Romanova, was one of the ill-fated daughters of the last Russian Tsar, Nicholas II.
 Also translated as Tatyana, the name appears in Alexander Pushkin's verse novel Eugene Onegin and the opera based on it, and it was used by Chekhov as well.
 Tatiana Kennedy Schlossberg is the daughter of Caroline Kennedy, and it is currently chic in France.
 
Tatiana peaked in 1999, when it ranked at Number 213. It's been falling since then, but never as dramatically as this past year. The culprit is likely Tatiana's Russian origins. The war between Ukraine and Russia broke out in February 2022, and American parents turned away from distinctly Russian names as the war waged on.

Tatiana

Tilianna

Vivianna

Yulianna

Zianna

AnoushkaCC's list "Names That Have "Anna" In Them" of 29 great name ideas: Alanna - Zianna!