The Hadith about when the child is to be named falls into two classes:

1. Those which mention naming the child on the seventh day after the birth. Like the Hadith of Samurah – (RA) who said: Allah’s Messenger (SAW) said:

“Every child is held in pledge for his’ Aqeeqah which is sacrificed for him on his seventh day, and he is named on it and his head is shaved” (Reported by Ahmad, Abu Dawud and the remaining 3 Sunan)

The Hadith that the Messenger (SAW) ordered that the child be named on the seventh day, that the harm be removed from him and the sacrifice (the ‘Aqeeqah) be performed. (Reported by Al-Tirmidhee)

2. And those which indicate naming the child on the day of its birth. From these is the Hadith of Anas (RA) who said: Allah’s Messenger (SAW) said:

“A boy was born to me this night and I have given him the name of my forefather Ibrahim. (Reported by Muslim and Abu Dawud)

Allah’s Messenger (SAW) also named ‘Abdullaah ibn Abee Taihah. (Al-Bukhari and Muslim) Another baby was brought to him after birth and he called it al-Mundhir (Al-Bukhari and Muslim) and there are many examples like this.

So from the previous Hadith we can see that the time for giving the name is something flexible – and all praise and thanks are for Allah (SWT) – so it may be named on the day of the birth, or delayed until the seventh day after birth – just as it is allowed between the two and later on. However, the time when it is recommended to name the child is the seventh day after the birth since that occurs in the words of the

Prophet (SWT) and so it is taken to be a recommendation, and the Hadith mentioning the day of its birth report the Prophet’s (SAW) action – and are, therefore, taken to show & what is permissible.

The name given to the child must be meaningful, lovely and good. On the Day of Resurrection, a person will be called by his name and the names of his parents. Therefore, a good name must be selected. (Abu Dawood) Allah, the Exalted, likes best the names Abdullah and Abdur Rahman. (Muslim)
Those names must not be given to the child, that affect his personality or become a cause of ridicule. The Messenger of Allah, (Sallallaho alaihe Wasallam) always changed names that were derogatory (Tirmizi) The name of one of the daughters of Sayyidna Umar was Asiyah (meaning, disobedient), the Prophet (Sallallaho alaihe Wasallam) changed it to Jamilah. (Tirmizi and ibn Majah) Besides, the Noble Prophet (Sallallaho alaihe Wasallam) changed such names as Aziz, Utlah (hardness, thickness), Satan, Hukm, Ghurab (crow), Habab (snake, Satan). (abu Dawood) He also changed the names, Harb (war) into Silm (peace), Muztaja’ (one who lies down) into Mumbais (one who is prepared, ready), Banu az-Zania (the product of adultery) into Banu ar-Rushdah (good people) Banu al-Maghwiyah (one who misleads) into Banu ar-Rushdah.
We must not give names that intimate to ill omen or bad character. The grandfather of Sayyidna Sa’id bin al Musayyab presented himself before the Noble Prophet (Sallallaho alaihe Wasallam) asked him his name “Hizn” was the reply (meaning, hard ground, surliness). He said, “Your name is Sahl (easy) . He replied, “How can I change the name given to me by my father?” Sayyidna Sa’id says that from then on hardness of character is found among us. (Bukhari) Sayyidna Yahya bin Sa’ id says that Sayyidna Umar asked a person his name. He replied, ” Jamrah” (live coals “And the name of your father?” ‘ Shihab (meteor). “With whom are you connected? He replied, “Harqah” (burning). Sayyidna Umar asked him, “Where do you live?” “Harrat un-Nar” (heat of fire). “Where is it?” “Zat Lazza” (flames of fire). Sayyidna Umar e (Radhiallaho Anho) said to him, “Go home, quickly! The people of your house have perished from burning”. It turned out so truly (Malik in Muwatta)
The name selected for the child must be other than a name of Allah; thus, it should not be Ahad, Khaliq or Razzaq. It is permissible, however, to name the child Abdul Ahad, Abdus Samad or any other name of Allah compounded with Abdul.
When Sayyidna Hani came to Madinah with his people, they called him Abu Hakm. The Messenger of Allah, (Sallallaho alaihe Wasallam), said, “Only Allah, the Exalted, is Hakm. He alone is the One Who decides. Why do they call you Abu Hakm?” He replied, “If a dispute arises among my community, they ask me to decide between them. Both the parties are happy with my decision”. He said, “This is commendable. We must settle the disputes of our folk. Say, do you have any son?” “I have three sons, Sharih, Muslim and Abdullah.” “Who is the eldest?” “Sharih is the eldest.” The Prophet said, “Your kuniyah (title) is Abu Sharih.( abu Dawood)
According to a hadith, on the Day of Resurrection, the worst of all persons in the eyes of Allah and liable to punishment will be he whom people will call Shahinshah (King) Only Allah, the Exalted, is Shahinshah (meaning, King of the monarchs) and kingdom belongs to Him alone. (Muslim)
We must not give names to our children that indicate good fortune. Suppose the names to be Aflah (successful) Nafe’ (profitable), Ribah (beneficial), Yasr (easy). if in a gathering, someone calls out a person by such a name and he is not there, the answer “not here” might imply that this characteristic is lacking in that assembly. Ahadith says: Allah, the Exalted, likes most four phrases subhaan Allah, wal. hamd u lillah, wa la ilaha ill Allah and Allah u akbar.
Do not give your sons the names of Yasar, Najeeh or Aflah. You will ask for them. If they are not there, the person replying would say ‘not here’. These are four names; do not refer to me after adding to these names (abu Dawood, Tirmizi)
While naming their children, parents must ensure that the names they select signify servitude to Allah alone and to no false deity. They may not associate or bondage even to the name Nabi. Certain forbidden names include Abdul Uzza, Abdul Ka’bah, and Abdun Nabi. Similarly, parents must not give names to their children that emphasize love and romance. Some of these names are: Hiyam, Beef’a, Nihau, Sosan, Miyadah, Gadah, Ahlam. These mean ‘violent love’, ‘slim waist’, ‘large bosomed’, ‘fragrant flower’, ‘walks swinging to and fro’, ‘soft and delicate woman’, ‘dream’. Islam envisages Muslims as a people of remarkable attributes. When parents select vulgar and romantic names, they risk tainting the character of the child.
The Messenger of Allah,(Sallallaho alaihe Wasallam) has encouraged his follower (Ummah) to call their children with meaningful names. He has suggested names of the Noble Prophets, (Sallallaho alaihe Wasallam) Abdullah or Abdur Rahman. This, because they may stay the best of Ummah and fulfil their duty diligently in guiding humanity to Islam and truth. The words of a hadith are: Keep the names of the Noble Prophets,(Sallallaho alaihe Wasallam) Allah, the Exalted, loves most the names Abdullah and Abdur Rahman. The most truthful names are Harith and Humam. The most disliked names, and vulgar too, are Harb and Murrah (respectively, war and bitter.