Smaragd (Smaragdus) or Zsámbéki was the name of a gens (Latin for "clan"; nemzetség in Hungarian) in the Kingdom of Hungary.
The ancestor of the clan was a French knight calling himself at that time "Ainordi (Aynard) de Champagne", who settled down in Hungary around 1186 during the reign of Béla III of Hungary and received use of the estate of Zsámbék under a royal grant.
The only known knight with such a name in service to the French crown and/or the Count of Champagne at that time was Adehemar (aka Aymar or Aynard).
That knight had been the Viscount of Limoges until 1183, when he was outlawed by King Henry II of England for insurrection against the English monarch.
She knew the knight Aynard well, so he would be a natural choice to escort her to Esztergom to join her new husband Bela III.