@dadpad,
dadpad wrote:some say dee. like we me he.
some say d' like the d sound in thud or dog. I prefer this form of pronunciation which i understand is closer to the original french pronunciation
de is of french origen and means "of"
no one is as well remembered as the Marquis of Lafayette.
...I would suggest that the Marquis de Sade might beat him in the memory stakes.
I know that when foreign words and phrases are imported into English, the pronunciation can become anglicised, but in general this does not apply to proper names (with a number of exceptions e.g. Paris). Family names can be pronounced the English way if they are of long standing like many American names of European origin.
Saying "dee" to rhyme with we, me, he would be considered a mistake by French people, and since the Marquis de Lafayette was indubitably a Frenchman, we should do him (or rather his memory) the courtesy of pronouncing his name properly. The 'e' of 'de' is pronounced like the 'e' in the English words later, father, summer, faster, etc. The 'qu' of Marquis is pronounced like the letter 'k' in kill, book, make, etc. , and the final 's' of Marquis is silent.