btw, Majkrzak is a little incorrect form of Majchrzak, it probably comes from the fact that in many (especially rural) ares the combination of "-chrz-" is prononuced like "-krz-" (in "chrz" both sounds are voiced, in "krz" both voiceless)
krz - is always pronounced as "ksz" (ksh).
a little off topic:
Voiceless (I hope I'm using the correct English term) doesn't mean mute, voiced-voiceless pairs of consonants are for example g-k, b-p, d-t, and by the way, in English sometimes you pronounce k, p, t, in a little different way than in Polish, with more aspiration. Polish has pretty strict rules about voiced/voiceless pronounciation, the voiced consonants (b, d, dz, dź, dż, g, w, z, ź, ż/rz) become voiceless (p, t, c, ć, cz, k, f, s, ś, sz) at the end of the word (Bug, bóg, buk - all pronounced the same in nominative case) and in the proximity of other voicelss consonant (that's why the voiceless "k" changes the "rz" into "sz")
This rule doesn't apply to the voiced consonants that don't have a corresponding voiceless sound in Polish phonetics (j, l, ł, m, n, r), and originally "h" was voiced and "ch" voiceless, but now only few people (with a very "good ear", old-school actors, and some people originating from pre-war Eastern Poland) can pronounce the voiced "h", normally both "h" and "ch" are voiceless
And now I've realised I made a mistake in my post about Majchrzak having a voiced combo of "chrz" :)
I took off my headphones (I was listening to some music), said both words (Majkrzak and Majchrzak) aloud, and it's like I just wrote in the general rules, "-chrz-" is voiceless ("-hsz-"), sorry for a confusion, if someone read it :)