Justina(e) is the main character. Similar to "Gone with the Wind."

[Nadya]

Read book equivalent of “Gone with the wind” and following read related titles, one of which contained a story with main character female heroine Justina(or Justine I can’t remember the spelling right…

[Sue]

Modern or historical? There's a female character in Lindsey Davies' "Falco" books called Helena Justina. They're set in ancient Rome.

[Eric]

Could it have been the Alexandria Quartet by Laurence Durrell ?

[Lobstergirl, au gratin]

It is mandatory to include genre and plot details in your topic header, as per the Group Rules.

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[Kris]

Nadya, what's the genre - e.g., adult historical romance, family saga, etc.?

Can you tell us more about the main characters and the plot?
Does the story take place before, during or after the US Civil War? Location?

I copied a few details to the topic header. Feel free to edit it.