YouTube channel name and icon reflect the name and photo of the connected Google+ page or profile.
If your channel is connected to Google+, you can change the channel name. Please follow the step by step instruction below or watch the video for clear understanding.
Step 1: Sign in to Your Channel on YouTube.
Step 2: Open the Guide Icon and Click on "My Channel".
Step 3: Point Your Cursor at Your Channel Name and Click on the Pencil Icon and Then Click on Channel Settings.
Step 4: Under Account Information, Click Change Next to Your Channel Name.