Starting with AIX7.1 TL4 and AIX7.2 TL0 and Firmware for 840 you can now make dynamic LPAR name changes on AIX.

 

Before the Name Change.

$ date
Thu 13 Jul 20:02:52 2017

$ lparstat -i | grep Partition

Partition Name : AIX-TEST01
Partition Number : 149

 

Change the name on HMC.

> chsyscfg -m frame -r lpar -i 'lpar_id=149,new_name=MY-LPAR'

 

The name is updated on the LPAR.

$ date
Thu 13 Jul 20:03:21 2017

$ lparstat -i | grep Partition

Partition Name : MY-LPAR
Partition Number : 149