Pet names starting with L, the most used letter there is

578 names begin with L, and they average 110 registrations each. That's more than any other initial manages, with O in second place at about four fifths of it.

L isn't the largest letter — several hold more names — but the animals are piled onto it more heavily than onto anything else in the alphabet. That's the single most striking fact in a letter-by-letter reading of this catalogue, and everything else on this page is either a cause of it or a consequence.

Lucky, Lily, Lulu, Luna, Lady

The top of this list is where the weight sits. These aren't obscure choices being counted carefully. They're among the most registered names in the entire catalogue, and five of them happen to share an initial, which is not a coincidence anybody arranged.

Look at what they have in common beyond the L. Four of the five are two syllables. Four end on a vowel or a -y. None has a hard stop anywhere after the first letter. They're the same name wearing five different coats, and that shape is the most chosen shape in pet naming full stop.

It's also the softest large letter

275 of the letter classifies as soft-sounding, which is close to half of it. The reason is anatomical. L is a liquid consonant: the tongue touches the ridge behind your teeth and the air flows around the sides of it, never stopping, never bursting.

So a name that opens on an L and ends on a vowel has nothing hard in it anywhere. Luna, Lulu, Lola, Lily. You can say any of those while half asleep, while eating, while holding something in your teeth. There's no physical effort in them at all, and over fifteen years of saying a name several thousand times that turns out to matter a great deal more than anyone predicts at the start.

Which is why it reads female

236 of these names measure female against 158 male, and 124 of them end in -a. The softness and the lean arrive together, as they do everywhere in this data. You can't take one without the other.

The male half of L is small but notably distinct: Loki, Leo, Louie, Lincoln, Lucky. What those share is a harder consonant in the middle doing the work the initial won't — the K in Loki and Lucky, the hard C in Lincoln. If you want an L name that doesn't read soft, that's the mechanism to look for.

The catch, and it's a real one

Density is crowding seen from the other side. A slice averaging 110 registrations per name is a slice where your choice is shared, and at the top of this particular list it's shared with thousands of other animals.

Luna is the clearest case. It's been the most popular cat name in much of the English-speaking world for years running, and in a decent-sized block of flats you will not be the only person calling it. If that bothers you, the answer isn't to leave the letter. It's to work down the list rather than across the top of it.

Below the famous five the letter is deep and largely unclaimed: Linden, Lark, Lupin, Lyra, Lennox, Lyle. All of them have the same liquid ease and none of them will turn four heads at a park gate.

Leave it, which is the clash to think about

There's one cue collision here and it's worth taking seriously, because Leave it is among the most useful things you will ever teach a dog and the one you'll need most urgently. It's the word that stops an animal eating something on a pavement.

It opens on exactly the same liquid as Lily, Lulu, Loki and Lola. Worse, Leave it is normally said sharply, which is also how you say a name when a dog is about to do something stupid, so the two arrive in the same tone as well as with the same opening sound.

The practical answer is the vowel again. Leave sits on a long ee, so Lily and Leo are the names closest to the line and Lola, Luna and Lucky are comfortably clear of it. That's a small consideration that costs nothing at the naming stage and saves a little confusion in month three.

Lucky, and the names people give rescues

Lucky is worth pausing on, because it belongs to a category that barely exists outside pet naming: names that are a statement about the animal's history rather than a description of the animal.

It goes overwhelmingly to rescues, strays and dogs that came through something. So do Hope, Chance, Angel and Survivor. Nobody names a carefully planned pedigree puppy Lucky, because the name only makes sense against a background of things having very nearly gone the other way.

It's one of the few naming traditions in this whole catalogue that's genuinely about the person doing the naming, and there's nothing wrong with that. A name is allowed to mark the day you found each other.

What the top names mean

Luna is Latin for the moon and has been doing service as a name for centuries. Lily is the flower, and it belongs to the large family of botanical names that keep turning up wherever people name something they're fond of. Lola is a Spanish short form of Dolores, which means sorrows, and is therefore one of the cheeriest-sounding names in the catalogue with one of the bleakest origins.

Lady is a title in the same tradition as Duke and Queenie, given an enormous boost by one animated film in 1955 and never really slowing down since. Leo is Latin for lion and a perfectly reasonable thing to call a nine-pound cat. Lulu is pure sound, a reduplication with no formal name behind it, which is why it feels like a nickname even when it's the only name the animal has.

Naming a litter to L

L is a comfortable letter for a breeder in terms of supply and a slightly treacherous one in terms of distinctness, because so much of it is built on the same soft two-beat frame.

Lily, Lulu, Lola, Luna, Lucy and Lacy in one litter is six dogs with one name between them. Every one of those is L plus vowel plus soft consonant plus vowel, and at any distance that's an identical noise.

The fix is to raid the letter's harder half. Loki, Lark, Lincoln, Lyle, Lux, Lottie. Now there's a K, an R, a hard C, an L-to-L and an X in the mix, and six owners get six names their dogs can actually distinguish.

L names for cats

This is the letter's natural home, and the numbers say so. The softness that costs a dog its carrying power is pure advantage on an animal you address quietly, at close range, in a voice you'd never use in public.

Luna, Lily, Leo, Loki, Lola, Lulu. That's most of the top of the letter and most of the top of cat naming generally, and there's a real reason for the overlap: the L lets you stretch and soften the first sound indefinitely. You can say Luuuna in a way that no name beginning with a hard stop permits, and anybody who lives with a cat knows exactly which register that belongs to.

Loki deserves its own line as the great male cat name of the last decade or so. It's Norse, it's a trickster god, it's two brisk syllables with a hard K in the middle for grip, and it describes the behaviour of roughly every cat that has ever lived. Few names have ever been so widely deserved.