http://www.omniglot.com/writing/avestan.htm
http://www.ancientscripts.com/pahlavi.html
http://www.ancientscripts.com/avestan.html
Indo-European
The most well known of all language families is the Indo-European, which comprises roughly 12 major groups and hundreds of languages. The major groups or subfamilies are Celtic, Italic (including Romance), Baltic, Slavic, Germanic, Anatolian, Greek, Indic, Iranian, Tocharian, Albanian, and Armenian. In addition, it appears that Baltic and Slavic should form a larger Balto-Slavic group, and Indic and Iranian should be placed in an Indo-Iranian group.
Here's small list of words common to most Indo-European languages:
Group Language Lexicon
"father" "mother" "brother" "two" "three" "four" "horse"
Germanic Old English fęder modor brošor twa thrie feowre eoh
Italic Latin pater mater frater duos tres quattuor equus
Celtic Old Irish athair mathair brathir do tri ceathair ech
Hellenic Greek pater meter phrater 1 duos tri tetra hippos
Indic Sanskrit pitar matar bhratar dva trayas chatvari asva
Iranian Avestan pitar matar bratar dwa trayo chatvaro aspa
Slavic Russian otech matka brat dva tri chetyre loshaa (kon)
Armenian Armenian hayr erku erek' cork'
Tocharian Tocharian B pacer macer procer wi trai s'twer yakwe
Proto-Indo-European *pəter *mater *bhrater *duwos *treyes *kwetores *ek'wos
Persian currently "Pedar"/"Madar"/Baradar"/"do"/se/chahar/
English daughter persa dokhtare
Note:
1. Greek phrater means "clan member"
http://www.ancientscripts.com/hl_families.html