Jiannis is of Greek origin, derived from the Greek name Ιωαννης (Ioannis), which itself stems from the Hebrew name Иochanan (Yochanan). This name means "God is gracious" or "graced by God". It is a popular name in Greece and other parts of the Mediterranean region.
"Jiannis experienced a significant increase in popularity from 2020 to 2021, with 11 births recorded that year compared to the previous year's 6. However, it seems to have leveled off since then, with 6 births again in 2022 and 8 in 2023. Overall, there were a total of 31 babies named Jiannis born between 2020 and 2023."