You can search for a person in your Mac’s Contacts app (“Address Book” app on older systems) by typing the first initial, then the last name (or enough of the last name for the Mac to find what you’re looking for). It also works to type the entire first name, then the last initial, but it’s faster to do it the other way.
So, if you’re trying to find ME in your Contacts app, you’d do ⌘-F to put the cursor into the Find… box, and then you’d type “cboyce.” You don’t have to hit Return– the search is “live.”
If you prefer, you can do “c (space) boyce” but the space is not required. So save a tiny bit of typing and leave the space out.
Today is my sister’s birthday, by the way.