Intune device shows multiple register names for Hybrid Azure AD Joined

Could someone please advise, If I logged on to any Device (Hybrid Azure AD Joined) with my ID for initial registration, its appears my Name in Intune portal.......
What If i assign this to end user, how much time it will take to appear End User Name in Intune  Portal (cycle) and will my name will be goes of from the portal for that device .....if its not going do i need to initiate Retire process for that device or what?