Sayyid, Sharif, Mirza and Habib

The term or name Sayyid is an honorific title added to the names of males who claim decendance from the Muslim Rasul or Prophet Muhammad, Mohamet through his grandsons Hasan ib'n Ali and Husayn ib'n Ali.

The female equivalent title is Sayyida. If only the mother and not the father carries the blood of the Rasul their children may use the title/name Mirza but not the title Sayyid.

Sunnis use the term Sharif for descendants of Hasan ibn' Ali, reserving the title of Sayyid for descendants of Husayn ib'n Ali. Habib is also used for descendants from both Hasan and Husayn. A Punjabi version of the word is - Said, as in Said Khan. Which with the glotteral stop included is rendered as Sa'id Khan.

From 1201 until the Hejaz was conquered by Ibn Saud in 1925, the family of the Rasul held the office of the Sharīf of Makkah, often also carrying the title and office of King of Hejaz. His descendants now rule the Hashemite Kingdom of Jordan, the name being taken from the Banu Hashim, the sub-tribe of Banu Quraish, to which Muhammad belonged.

The word has no etymological connection with the English term sheriff, which comes from the Old English word scīrgerefa, meaning "shire-reeve," the local reeve (enforcement agent) of the king in the shire (county). … (wikipedia)

However

Even though it is said that there is no connection to the similar words, in English and Arabic, it is interesting to note that the duties associated with the two 'unassociated words' are similar, if not the same, odd coincidence, what!

Sharīf (Arabic: شريٝ) is a traditional Arab tribal title given to those who serve as the protector of the tribe and all tribal assets, such as property, wells, and land. … (wikipedia)