Phonetic transliteration following the 'Van/Fan + tos' shape:
范 (fàn) for 'Van-' / 'Fan-',
托 (tuō) for '-to-',
斯 (sī) for '-s'. The character
范 is the standard rendering for European-style 'Van' / 'Von' / 'Fan' name openers (cf.
范德萨 'van der Sar',
范布伦 'Van Buren');
斯 is the universal '-s' ender.