The Search of the databases can be started from http://www.usgennet.org/search/ (two screens here):
There are 43 results for Lamph*. The top of the screen shows the name variations that the site found in the 43 matches. I like knowing what variations it found.
The user can look at the variations and get ideas for name searches on other sites that don't permit wild cards. Note that the names are not from a Soundex or similar algorithm. If they had been, the first search would have found Lanfear and other names that Soundex the same.