Since this Ashleigh Ball has 42 times the page views of the only other Ashleigh Ball (20639 vs. 488 over the last 90 days, or 97.7 percent of all page views for people named "Ashleigh Ball") and even the disambiguation page gets nearly four times the page views of the other Ashleigh Ball (1880 vs. 488), it's clear which Ashleigh Ball readers are looking for. Furthermore, looking at the "staying power" in the public consciousness of others in their occupations (actress and musician vs. Olympic lacrosse player), we should expect that gap to do nothing but grow.  Therefore, I suggest Ashleigh Ball, with the current page there moved to the "(disambiguation)" title.