[quo]*Quote from * Mauricio
I'm not quire sure what you mean by "Perdonay" but I think it may be more of a slang.
I think what kaichandler means, is perdone, meaning pardon; forgive (e.g., perdóneme) if I'm right.
Some resources for learning Spanish, give the English speaker an example, known as transcription letters, on how to pronounce certain Spanish words. Por ejemplo, in order to correctly pronounce the final e in perdone, an example for one who speaks native English, may be to use the spoken sound of the English alphabet and vowel, "a"(EY: [the transcription letters]). As kaichandler mentioned about Chardonnay, you take the pronunciation of the 'AY' in Chardonnay, and apply it to the pronunciation of the final e in perdone. There you have it!
Also, another way to excuse yourself from a person or a group of people, is with "Con permiso", which is widely used in Mexico.
For more details, check out these links: http://www.wordreference.com/es/en/translation.asp?spen=perdone, http://forum.wordreference.com/showthread.php?t=1442.