A cat must have three different names
Old Possum's Book of Practical CatsA cat must have three different names is the governing rule of the poem’s account of feline identity. It distinguishes the name used in everyday family life, a unique name that identifies an individual cat, and a final name inaccessible to human inquiry. The rule turns naming into more than a practical act of recognition: it marks a boundary between what people can call a cat and what the cat alone knows of itself.
The Three Levels of Naming
The poem presents the naming of cats as a difficult matter, not a casual game. Its emphatic insistence that each cat must have three different names establishes a deliberate order: ordinary social use comes first, individual distinction follows, and an inward name remains beyond human reach. Each level answers a different question about identity, moving from how a cat is addressed by others toward a knowledge that cannot be shared.
The first kind is the name a family uses every day. Peter, Augustus, Alonzo, and James illustrate the familiar names that make a cat recognizable in domestic life. Their plain familiarity contrasts with the poem’s more elaborate account of the names that follow; this first name serves everyday address, but cannot contain the whole identity the rule describes.
Distinctive Names and Individuality
Beyond the family name, the poem describes names of a kind that never belong to more than one cat. Munkustrap, Quaxo, Coricopat, Bombalurina, and Jellylorum exemplify this level. The principle of exclusivity gives the names their force: they do not merely label a cat within a household but distinguish that cat from every other one.
The poem links this distinctive naming to feline bearing, invoking the upright tail, spread whiskers, and cherished pride. These gestures make individuality visible in the body, while the exclusive name gives it a verbal counterpart. The cat’s self-possession is therefore expressed both through posture and through a name reserved for a single bearer.
The Name Beyond Human Knowledge
The final name is set apart as one that no human research can discover. Its secrecy is not presented as a puzzle people might solve with enough effort: the cat itself knows the name and will never confess it. The rule thus ends by placing a limit on human access. Even the poem’s detailed classification of names cannot cross the boundary between describing a cat and possessing its private knowledge.
That hidden name also explains the poem’s account of feline meditation. When a cat sits in profound thought, its mind is said to be absorbed in contemplation of its name. The repeated return to that thought makes the name a center of inward attention, rather than another item in the public list of ways to address the animal.
Wordplay and Significance
The closing phrase, “His ineffable effable / Effanineffable / Deep and inscrutable singular Name,” plays with the tension between saying and not saying. “Ineffable” suggests what cannot be expressed, while the invented-sounding “Effanineffable” makes that difficulty itself audible. The phrase gestures toward the secret name without revealing it: language can circle the boundary, but the name remains undisclosed.
The three-name rule therefore organizes the poem around degrees of access. A family can use one name; a cat can possess a distinctive one; the deepest name belongs to the cat’s own knowledge alone. The sequence gives feline individuality both a public form and a deliberately protected inner limit.

