The name al-Fātiḥah (“the Opener”) is due to the subject-matter of the surah. Fātiḥah is that which opens a subject or a book or any other thing. In other words, a sort of preface.
The word الفاتحة came from the root word فتح which means to open, explain, disclose, keys of treasure etc. That means sura Al-Fatiha is the summary of the whole Quran. That is why we recite another Ayat or sura along with Fatiha in our prayers. That is, sura Al-Fatiha is paired with rest of the whole Quran.
It is also called Umm Al-Kitab (“the Mother of the Book”) and Umm Al-Quran (“the Mother of the Quran”);Sab’a al Mathani (“Seven repeated [verses]”, an appellation taken from verse 15:87 of the Quran); Al-Hamd(“praise”), because a hadith narrates Muhammad as having said: “The prayer [al-Fātiḥah] is divided into two halves between Me and My servants. When the servant says, ‘All praise is due to God’, the Lord of existence, God says, ‘My servant has praised Me’.”; Al-Shifa’ (“the Cure”), because a hadith narrates Muhammad as having said: “The Opening of the Book is a cure for every poison.”;, Al-Ruqyah (“remedy” or “spiritual cure”)., and al-Asas, “The Foundation”, referring to its serving as a foundation for the entire Quran