be on to

1. Be aware of or have information about, as in They can't pull that trick again; we're on to them now. [Colloquial; second half of 1800s]

2. Discover something important or profitable, as in The researchers claim they are really on to something big. [Colloquial; mid-1900s]

Informal

To be aware of or have information about: You'll never deceive us again; we're on to you.

Name	Pronounced	Usage
Sima (2)	-	Indian, Hindi, Marathi
Andreas	ahn-DRE-ahs (German, Swedish), ahn-DRHAY-ahs (Dutch)	German, Greek, Swedish, Norwegian, Danish, Dutch, Welsh, Ancient Greek, Biblical Latin, Biblical Gre
Eliyahu	e-lee-YAH-hoo	Hebrew
Drousilla	-	Biblical Greek
Simonette	-	English (Rare)
Kane	[kein]