“Nancy” is pronounced as [ˈnænsi]. The first syllable “Nan” is pronounced like the word “man” without the “m” sound. The second syllable “cy” is pronounced like “see”. So when you say “Nancy”, it should sound like “NAN-see”. It's a popular name and is easy to pronounce once you get the hang of it. Remember to stress the first syllable slightly more than the second. Practice saying it a few times to get the pronunciation just right.