If you fumble with a philosopher’s name, nothing you say afterward will sound credible. So, learn to pronounce these names correctly, then start worrying about their ideas.
(George) Berkeley is properly pronounced like Charles Barkley (bark-lee). This name is commonly mispronounced “burk-lee” like Berkeley, California, which, ironically, is named after George Berkeley.
(Friedrich) Nietzsche is commonly mispronounced as “nee-chee.” The correct pronunciation is “nee-ch-ya” and rhymes with “pleased ta meetchya.” “Pleased ta meetchya, Neechya.” Say it!
Lao-tzu (born ca. 604 BCE) is spelled several different ways in English transliteration from the Chinese. But no matter how you spell it, the proper way to pronounce it is “lau” (sounds like “ouch”)-“dsuh”. The stress goes on the first syllable.
(Charles Sanders) Peirce* (1839 – 1914) is commonly mispronounced as “peer-s.” The correct pronunciation is “purse,” which is somewhat funny because Peirce* rarely had a penny in his purse. Oddly, Peirce* took his middle name, Sanders, as an anglicized form of Santiago, or “St. James,” in honor of a fellow pragmatist, William James (1842 – 1910), who helped him out financially.
(Ludwig) Wittgenstein (1889 – 1951) is a name that demands authentic German pronunciation, and there are plenty of ways to slaughter it. Here’s one that embodies all of them, “wit-jen-steen.” The correct pronunciation is “vit” (rhymes with bit)-“ghen” (rhymes with ken)-“shtine.” The first name is pronounced “lude-vig.” If you think it’s hard to pronounce his name, try reading his Tractatus.