speak on

speak (up)on something

to talk about a particular topic. (Upon is formal and less commonly used than on.) This evening, I will speak upon the subject of Plato's thoughts on the universe. What will you speak on today?

Common Names:

Name	Pronounced	Usage
Alastair	-	Scottish
LourenÇO	law-REN-soo (Portuguese), law-REN-soo (Brazilian Portuguese)	Portuguese
Donatianus	-	Late Roman
Virginie	veer-zhee-NEE	French
Ainhoa	-	Basque
Piero	PYE-ro	Italian