How many {given name} are to/by {Andrew} ?
How many people have the given name Andrew?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P735 wd:Q43399 }
SELECT (COUNT(?sub) AS ?subs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sub .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P735> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q43399 .
} 

How popular is the name Andrew?