"The ASL alphabet is based on French sign language and was standardized by Thomas Gallaudet and Laurent Clerc."

"Students at the National Institution for Deaf-Mutes in France (see history to learn more) all came in with their own personal systems of gestures and ways of communicating. Gradually, a system evolved between the students and the teachers at the Institute and is probably what led to the creation of a French alphabet, from which we get the American manual alphabet."

American Sign Language (ASL) was not invented by a single person; it evolved naturally over time within Deaf communities in the United States. However, many credit Laurent Clerc, a Deaf teacher from France, and Thomas Gallaudet, a hearing educator, for bringing French Sign Language to the U.S. and laying the foundation for ASL.

American Sign Language (ASL) was recognized as a national language in the United States in 1988 with the passage of the Deaf President Now movement at Gallaudet University in Washington, D.C. This event marked a significant milestone for the recognition and acceptance of ASL as a legitimate language.

To sign "Brianna" in American Sign Language (ASL), you would fingerspell each letter of the name using the ASL alphabet.

Samuel Thomas Greene is the most known. Thomas Hopkins Gallaudet teaches ASL.