What is meaning of Buddha and how he called Buddha? By marathi language "Buddhi" means intellectual so what is meaning of "Buddha" or is same as Buddhi? Does people started call him Buddha ?
Definition of Buddha based on Pali Dictionary is here:

Buddha Skt., Pali, lit., “awakened one.”

The Wikipedia entry is here:

The word Buddha means &quot;awakened one&quot; or &quot;the enlightened one&quot;.
Hypothetical root budh &quot;perceive&quot; 1. Pali buddha – &quot;understood, enlightened&quot;, masculine &quot;the Buddha&quot;; Aśokan (the language of the Inscriptions of Aśoka) Budhe nominative singular; Prakrit buddha – ‘ known, awakened ’; Waigalī būdāī, &quot;truth&quot;; Bashkarīk budh &quot;he heard&quot;; Tōrwālī būdo preterite of bū, &quot;to see, know&quot; from bṓdhati; Phalūṛa búddo preterite of buǰǰ , &quot;to understand&quot; from búdhyatē; Shina Gilgitī dialect budo, &quot;awake&quot;; Gurēsī dialect budyōnṷ intransitive &quot;to wake&quot;; Kashmiri bọ̆du, &quot;quick of understanding (especially of a child)&quot;; Sindhī ḇudho, past participle (passive) of ḇujhaṇu, &quot;to understand&quot; from búdhyatē, West Pahāṛī buddhā, preterite of bujṇā, &quot;to know&quot;; Sinhalese buj (j written for d), budu, bud, but, &quot;the Buddha&quot;.

Buddha means one who understood or awakened. This understanding / awakening is based on intelligence gained.