In Jainism, the term "Chauvisi" refers to the set of 24 Tirthankaras who appear in each half of a time cycle (Avasarpini or Utsarpini). The current time cycle is Avasarpini, and the 24 Tirthankaras of this era begin with Lord Rishabhanatha (Adinath) and end with Lord Mahavira.

The "first chauvisi before current 24" refers to the set of 24 Tirthankaras who lived in the previous Utsarpini or Avasarpini, i.e., the set before the current one. According to Jain scriptures, time is eternal and cyclical, and in each cycle, 24 Tirthankaras are born.

The names of the Tirthankaras of the previous chauvisi are different from the current one. Some Jain texts, such as "Trishashti Shalaka Purusha Charitra" by Acharya Hemachandra, mention that the names and details of the Tirthankaras of previous cycles are different, but not always specified in detail. In general, Jain tradition emphasizes that there have been infinite cycles and thus infinite sets of 24 Tirthankaras, but the names and stories of those from previous chauvisi are not commonly listed or worshipped in the current era.

The focus in practice and worship is on the current chauvisi, starting from Rishabhanatha to Mahavira. However, some texts do mention that the first Tirthankara of each cycle is always named Rishabhanatha, and the last is always Mahavira, but the rest of the names may vary.

In summary: The first chauvisi before the current 24 Tirthankaras refers to the previous set of 24 Tirthankaras from the preceding time cycle. Their names and details are generally not specified in Jain scriptures, and the current chauvisi is the focus for devotion and study.