What are the names of all of the ajza' in the Quran? Aside from Juz 30, 29, 28, 26, I've seen different naming for these ajzaa, such Juz 27 being called "Qalla Fama Khatbukuma" based on the first words it begins, but other people call it Juz Adh-Dhariyat, based on the Surah it begins. Can you give me the naming based on where the first few words begin? and Juz 2 and 3 both started in Surah Al-Baqara, how did the people who name ajza on the name of the Surah name Juz 2 and 3? Jazakum Allah khayran
There are no specific names for the Ajza' in Qur'an. Actually, the reciters and learners of Qur'an came up with some names to make the referencing to Suwar (chapters) easier and more memorizable than numbers.
Names like (they are not standardly written):
Tabarak تبارك, Qad Sami' قد سمع, Al-Tharyat الذاريات, Amma عم, and Al-Ahqaf الأحقاف.
Some of them are named after the first Surah of the Juz', others are named after the first words of the first Surah in each Juz'.
But as you stated:
[...] Juz 2 and 3 both started in Surah Al-Baqara, how did the people who name ajza on the name of the Surah name Juz 2 and 3?
Here, such conflicts occur. Several Ajza' starts through the Suwars, and that's why it is not recommended to follow such an approach with Qur'an. Stick to the numbers of Ajza' (30 in total).