LAN ip address computer name will not be shown when assigned static ip addr

Dear folk

My home network setup is LinkSys router WRT1900ACS with mobiles and desktop computers connected wireless and wired

For my desktop if an ip assigned automatically router shows the desktop’s name as per the snapshot below :

View post on imgur.com

If the static ip address assigned router shows asterisk as per below :

View post on imgur.com

How the name can be shown when static ip assigned ?

Thanks