Hello
Please check:
http://www.whatfontis.com/Aviano-Contrast-insigne.font?text=yY
Alex
I found it using: http://www.whatfontis.com - Identify the font you are looking for!

Hoefler Titling Italics - http://www.typography.com/fonts/font_overview.php?productLineID=100011
BTW, I don't know any upright sans which could have this kind of /Y.

Palatino Sans Informal
Lithos
Requiem
Mantinia
Canto
Poetica
PF Monumenta Pro
Mynaruse

Jupiter
Galliard Italics

Thanks WhatFontis, Akira, Ryuk.
My question is not specific to sans, or upright sans.