The name "A'TIN" carries a profound meaning for SB19 and their fans. In November 2019, SB19 announced ‘A’TIN’ (pronounced as ey-teen) as their ​official fandom name. It cleverly plays on the number 18, signifying that before SB19 (19), there is A'TIN (18). This highlights that A'TIN is the ​support behind SB19's success. Additionally, "A'TIN" sounds like "atin" in Filipino, meaning "ours," underscoring the shared journey and strong ​sense of belonging between the group and their fans. This name beautifully reflects the deep bond and unity between SB19 and A'TIN. It signifies ​that the fans are always there to uplift and support the group, making SB19 complete and vice-versa.

On July 5, 2021, it was announced that the “A’TIN : Our Wind” logo design by the New York-based designer and concert photographer Karen ​May, is the official symbol of A’tin. Out of more than 120 entries, her design was chosen and voted for by both SB19 and A’tin.