Likely a modern variant of Chevonne or a surname derivative.
Shavell is a contemporary American name with ambiguous roots. It is often considered a phonetic variation of the French-influenced Irish name Chevonne (Siobhan), meaning 'God is gracious,' or potentially a creative elaboration of the English surname Shaw.
Less common today
Shavell isn't in the latest US Top 1000. It last peaked at #8,411 in 1992.
US births per 5-year period, 1990βpresent (SSA data).