墨 Mò is a useful first choice if you want to keep the opening of the established transcription 墨菲 Mòfēi. 莫 Mò is another real surname with exactly the same Mandarin sound, including the tone, and it begins the separately documented transcription 莫菲. These two options give you a concrete choice of character without pretending that one Mandarin syllable can preserve all of Murphy.
You can also keep the complete transcription. In 墨菲 or 莫菲, both characters represent your original surname; 菲 does not automatically become your given name. Choosing a short Chinese surname is an additional personal decision for the Chinese name you want to use.
Start with the transcription you actually use
The International Committee of the Red Cross's name reference lists Murphy—墨菲 on PDF page 16. The National Academy for Educational Research lists Murphy—莫菲 in its English surname table on PDF page 24. Both are published correspondences. Neither reference makes its spelling compulsory for every family.
If you already have a Chinese spelling in professional contacts, continuity may matter more than changing to another published form. If you are starting fresh, compare 墨 and 莫 on their own rather than treating the second as a spelling mistake. A transcription source establishes usage; it does not establish that every character in it is independently a Chinese surname.
Both first characters pass the surname test
The Ministry of Education dictionary independently records 墨 mò as a surname. It also gives ordinary senses involving ink and writing. You may enjoy those associations, but choosing 墨 does not identify you as a calligrapher or turn Murphy into a word meaning ink.
The same dictionary records the surname 莫 under mò, separately from the older reading mù found in other senses. This is the fourth-tone surname proposed here. Its everyday uses can express prohibition or absence; those word meanings do not describe the character of people named 莫.
Changing 墨 to 莫 therefore changes the written identity and associations, while leaving the Mandarin pronunciation Mò intact. The two are distinct surnames, not simplified and traditional versions of one character. Both keep the same form in simplified and traditional writing.
What Mò keeps, and what it loses
Murphy is normally two syllables, with stress on the first. In a non-rhotic English pronunciation, the written r is not pronounced as a separate consonant here; many Scottish and other rhotic speakers do pronounce it. Great Britain does not have one uniform family-name accent. Mò retains the initial m, changes the stressed vowel, and does not preserve an r sound when your pronunciation has one. Keeping only the first character also removes the whole part represented by 菲. Start with the way you and your family actually say Murphy.
Even Mòfēi remains an approximation: fēi ends in the diphthong ei, rather than copying the English final vowel exactly. Mandarin's fourth and first tones belong to the transcription. They are not a translation of English stress. These comparisons describe a general pronunciation pattern; your family's actual reading should be the starting point if it differs.
The practical trade-off is easy to explain: the full transcription gives listeners more of the original surname to recognize; a one-character surname gives you a shorter Chinese name, with a weaker sound connection. Neither choice requires you to hide Murphy in a bilingual signature.
The surname's history does not require a warrior name
The Dictionary of American Family Names excerpt reproduced by Ancestry explains an Irish route through Ó Murchadha and a personal name containing sea and battle elements. It also lists an English variant route. This is surname history, not evidence that every Murphy has the same ancestry or a maritime occupation.
I would not turn that explanation into an automatic recommendation of a Chinese naval hero's surname. The shared idea of fighting at sea would be too broad to establish a personal cultural connection. Nor does 墨 make the ancient thinker Mozi your ancestor. The sound-based choices already stand on their own; an additional historical route is useful only if it rests on something you genuinely want to carry into your name.
Try the character in an adult introduction
Say 我姓墨，墨水的墨。Wǒ xìng Mò, mòshuǐ de mò. for 墨, or 我姓莫，莫非的莫。Wǒ xìng Mò, mòfēi de mò. for 莫. The explanation identifies the character, not a personality. Pinyin alone cannot tell a listener which Mò you mean.
Then place each surname before the same proposed given name. Ask a Mandarin speaker to read the complete name, check unintended words and confirm the surname boundary. I would start with 墨 if 墨菲 is your preferred transcription and 莫 if 莫菲 or that character feels more natural to you.
Sources and methodological notes
ICRC name reference, PDF p. 16 and NAER English surname table, PDF p. 24 support Murphy–墨菲 and Murphy–莫菲. MOE 墨 and 莫 separately document the surnames and Mò readings.
DAFN Murphy, attributed reproduction supports the limited historical explanation, not an individual genealogy. Accent comparison and recommendation are editorial; try the surname with your intended given name.
British Surnames ordering and scope description: recorded source position 69, Murphy, for Great Britain: England, Scotland and Wales, excluding Northern Ireland. No frequency is supplied in this row. Reference period, counting unit and method remain unverified. The number is a private source ordinal, not a current official UK-wide population rank. The U.S. Murphy row belongs to a separate dataset and is not imported here.
