9.4 Naming your possessions, steeds and pets.

You can name loyal creatures, friends, weapons, and pieces of armour, so
that they may be recognised when lost. To do this, simply type NAME
followed by the item/creature, followed by the name you wish to bestow.
For example NAME LONGSWORD ORCSLAYER or NAME WARHORSE BIGFOOT.

See HELP PETS for further information obtaining a loyal pet for yourself.
See HELP STEEDS for details of steeds, most loyal of animal companions.