I found this on-line...it shows descriptions of large groups of people....maybe you can come up with something using these:
maybe....."welcome 100th member of our family circle" or "welcome #100 to our family flock" or whatever sounds good to you! Good Luck!
[h=3][/h]
[h=1]General words for groups of people - synonyms or related words
[/h]
[h=3]array[/h] noun
a
large group of
people or
things that are
related in some way
[h=3]circle[/h]
noun
a
group of
people who
know one another or are
related to one another
[h=3]droves[/h]
noun
large numbers of
people
[h=3]element[/h] noun
one
set of
people in a
group or
organization
[h=3]flock[/h] noun
a
large group of
people
[h=3]horde[/h] noun
a
large number of
people
[h=3]legion[/h] noun
a
large group or
number of
people
[h=3]the masses[/h] noun
a
large crowd of
people
[h=3]nexus[/h]
noun
formal
a
closely connected group of
people or
things, often
forming the
central part of something
[h=3]tribe[/h] noun
humorous
a
large group of
people