: This signature appears in his extensive collection of journals, which total roughly 13,000 pages of drawings and scientific observations.

: Since he was the illegitimate son of a Florentine notary, he was not permitted to use a traditional family name. Signing as "Io, Leonardo" emphasized his individual identity over his lineage.

: Contemporary biographers like Giorgio Vasari noted that first names were the primary way to refer to individuals at the time, and Leonardo's signature reflects this cultural norm. Media and Cultural References

: Io, Leonardo is a 2019 Italian biographical film starring Luca Argentero that explores the mind and works of the genius.

Because he was born out of wedlock, Leonardo did not have a formal family surname; "da Vinci" simply indicated he was from the town of Vinci. Consequently, he often signed his journals and works simply as "Leonardo" or more assertively as "Io, Leonardo". Historical Significance of the Signature

: In the modern era, the name Leonardo is associated with Leonardo.Ai , a popular generative AI platform used for visual content creation.

The phrase has also been used in various modern contexts to evoke the artist's legacy:

The phrase (meaning "I, Leonardo") is historically significant as the signature used by the Renaissance polymath Leonardo da Vinci .