Count: 0 — No Polish boy names that start with Y meet the criteria. This search looks for male given names attested in Polish usage or official registries (PESEL, Polish name dictionaries), and none appear that begin with the letter Y as used in Polish orthography. Note an interesting detail: the sound that English speakers write with Y at the start of names (as in “Yuri” or “Yakov”) is normally written with the letter J in Polish, so many comparable names exist in Polish but begin with J (for example, Jarosław, Jakub).

Polish spelling and sound rules explain the absence. The Polish alphabet treats Y as a vowel (pronounced /ɨ/) rather than the consonant /j/ that English labels with Y. Polish names that begin with the /j/ sound therefore use the letter J, not Y. Civil registries and name dictionaries record names in standard Polish orthography, so native and historically used Polish male names do not start with the letter Y.

Foreign or immigrant names that start with Y can appear in individual cases, but they are not established Polish entries and rarely show up in official name lists or name-day calendars. Transliterated Slavic names that begin with a Y in other languages generally have a Polish form that begins with J (Yaroslav → Jarosław, Yuri → Jurij/Jury or more commonly Juri), so advise searching J‑initial Polish names when you want names that sound like they start with Y. Consider Polish J‑names as the practical alternatives and consult PESEL or Polish name dictionaries for verified, attested forms.