| Iaap | male | unknown | N/A |
| Iago | male | N/A | The crafty and evil villain of Shakespeare's Othello. This dog is always scheming. |
| Ian | male | Scottish | God is gracious. |
| Ianna | female | Celtic/Gaelic | Fem. form of IAN |
| iano | female | N/A | N/A |
| Ibadan | male | N/A | A large city in Nigeria. |
| Iberia | male | N/A | A peninsula in Europe occupied by Spain and Portugal. |
| Ibis | female | N/A | legged bird related to the heron. The Egyptians regarded this bird as sacred. A fantastic name for any long-legged breed of dog. |
| Ibn Saud | male | N/A | He formed the kingdom of Saudi Arabia. |
| Ibrahim | male | Turkish | N/A |
| Icarus | male | N/A | The Greek mythological son of Daedalus. Daedalus fashioned wings for he and his son. Icarus flew too high and the sun melted the wax holding his wings together. He fell to his death. |
| Iceman | male | N/A | No matter what happens, I will keep my cool. |
| icey | female | N/A | N/A |
| Ichor | male | N/A | The fluid that flowed through the gods veins. |
| Icicle | female | N/A | I much prefer cold weather over hot weather. |
| Icky | female | N/A | Baths make me feel yucky. |
| Ida | female | Old English | prosperous |
| idaho | female | N/A | N/A |
| Idalee | female | American | From IDA and LEE |
| Idana | female | American | From IDA & |
| Idania | female | Slavic | Hardworking, Prosperous |
| Ide | female | Celtic/Gaelic | Thirst |
| Ideh | female | Hebrew | praise |
| Idol | male | N/A | My masters are in awe of me. |
| Idola | female | Greek | idolized |
| Idonia | female | Old German | industrious |
| Idyll | male | N/A | N/A |
| Ifama | female | African | All is Well |
| Ife | male | African | Wide, Love |
| Ige | male | African | Born by Breech |
| igloo | female | N/A | N/A |
| Ignacio | male | Latin | one who is lively |
| Ignatia | female | Latin | Faithful and full of fire. This passionate dog will never dessert you. |
| Ignatius | male | N/A | A saint and priest. He founded the Society of Jesus (Jesuits). |
| Igor | male | Scandinavian | Valiant. |
| Ike | male | Hebrew | From the name ISAAC |
| Ila | female | Hindu | N/A |
| Ilana | female | Hebrew | sunshine |
| Ilandere | female | American | Moon Woman |
| Ilar | female | Welsh | Cheerful |
| Ilaria | female | Latin | one who is merry |
| Ilario | male | Italian | Cheerful |
| Ilhan | male | Turkish | N/A |
| Iliad | female | N/A | The Iliad is the oldest surviving Greek work of poetry. It concerns the last year of the Trojan War. |
| Ilisapesi | female | Tonga | blessed one |
| Ilium | female | N/A | Troy. |
| Illusion | female | N/A | I'm capable of unbelievable dog tricks. |
| Ilona | female | Hungarian | beautiful, sunshine |
| Ilori | female | African | Special Treasure |
| Ilya | male | Russian | From Elijah |
| Ilyssa | female | Hebrew | Rational |
| im2ak9 | female | N/A | N/A |
| Imala | female | Native American | Disciplinarian |
| Iman | female | Arabic | A believer in Mohammed. |
| Imani | female | N/A | N/A |
| Imanol | male | N/A | N/A |
| Imaran | male | Hindi | Strong |
| Imelda | female | German | A fierce fighter. This dog will protect you no matter what. |
| Imogene | female | Latin | image |
| Impala | female | N/A | brown dog with long legs and great leaping abilities. |
| Imre | male | German | great king |
| Ina | female | Hindu | N/A |
| Inayat | female | Hindu | kindness |
| Inca | female | N/A | A tribe of Indians which developed a highly civilized Empire in South America, until conquered by the Spanish. |
| Incubus | male | N/A | An evil spirit thought to attach itself to sleeping victims. |
| Indaliai | female | N/A | sea-feather, feather from the sea shore |
| Independence | female | American | Freedom |
| India | female | Sanskrit, English | river |
| indiana | female | N/A | N/A |
| Indic | male | N/A | A term which means of India. Another appropriate name for an Asian breed of dog. |
| indica | female | N/A | N/A |
| indigo | female | N/A | N/A |
| Indira | female | N/A | Indira Gandhi was the 1st woman prime minister of India. This girl dog is very powerful indeed. |
| Indivar | male | Hindi | Blue Lotus |
| Indiya | female | American | Philosophical one |
| indonesia | female | N/A | N/A |
| Indra | male | N/A | The early Hindu god of rain and thunder. This dog gets excited during a storm. |
| Indrina | female | Hindu | deep |
| Ines | female | Spanish | gentle |
| Inez | female | Spanish | Flawless. A good name for any full-blooded dog. |
| Infant | male | N/A | N/A |
| Infinity | female | American | Endless |
| Inga | female | N/A | I come from the land of the ice and snow. |
| Inger | male | Norse | The son's army. |
| Ingmar | male | Scandinavian | famous son |
| Ingo | male | N/A | N/A |
| Ingolf | male | N/A | N/A |
| Ingrid | female | Scandinavian | A child of the hero. |
| Iniko | female | African | Born During Troubled Times |
| ink | female | N/A | N/A |
| inky | female | N/A | N/A |
| Innin | female | Sumerian Mythology | The mother goddess. |
| Ino | female | Roman Mythology | The daughter of Cadmus. She leapt into the sea with her son to escape her mad husband. She and her son were then turned into divine sea creatures. |
| Inocencia | female | Spanish | Innocent |
| Inoke | female | Hawaiian | Devoted |
| inspector | female | N/A | N/A |
| Intuit | female | N/A | I sometimes understand without you having to say a word. |
| Io | female | Greek | N/A |
| Iola | female | Welsh | Violet-Colored Dawn |
| Iolana | female | Hawaiian | to soar like an eagle |
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